Non-contact selection device

ABSTRACT

A non-contract selecting device is disclosed. The non-contract selecting device include a light source, emitting light to an outside; a camera unit, generating and outputting a video signal corresponding to an external video; a video data generating unit, generating video data corresponding to the video signal; and an identity unit, detecting a location of a detected area formed by light, reflected by pointing-means and inputted, of the light emitted from the video data in units of each frame, recognizing a moving locus of the detected area by comparing at least two continuous frames and generating and outputting corresponding change information. With the present invention, the function-selecting can be more quickly and easily and increase making the most use of elements.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a Continuation of co-pending application Ser. No.13/529,623 filed on Jun. 21, 2012, which is a Continuation ofapplication Ser. No. 12/298,730 filed on Oct. 27, 2008, now U.S. Pat.No. 8,217,895, which is a U.S. National Phase of PCT/KR2007/02126, filedApr. 30, 2007, and which claims priority to Application No.10-2006-0039028 filed in Korea, on Apr. 28, 2006, Application No.10-2006-0050059 filed in Korea, on Jun. 2, 2006, and Application No.10-2006-0053660 filed in Korea, on Jun. 14, 2006. The entire contents ofall of the above applications are hereby incorporated by reference.

BACKGROUND

1. Technical Field

The present invention relates to a function selecting method by using acamera, more specifically to a device and method capable ofnon-contactly selecting a function by using a camera.

2. Description of the Related Art

Today's remarkable development of electronic and communicationtechnologies allows a user to use various functions such as Internetsurfing, video communication, moving picture or music playback, andsatellite broadcast watching by using a digital home appliance (e.g. acomputer and a digital camera) or a portable communication terminal.Accordingly, a key inputting method for efficiently selecting desiredfunctions is requested for a user to enjoy more various functions.

The most favorite method of conventional function selecting methods isto directly manipulate a plurality buttons of key pads provided invarious kinds of devices. In other words, the user presses a menu key,and then, manipulates a direction key (or cursor key) several times, tomove a cursor to desired information item (e.g. an icon) displayedthrough an LCD screen and executes a desired function by selecting theinformation item located with the moved cursor by use of the selectionkey.

However, in accordance to the conventional function selecting method, itis requested to manipulate a button several times, in order to execute auser's desired function. Particularly, although limited functions areactually used as compared with enormous functions of today's digitaldevices, it is a troublesome work for the user to have to undergo theaforementioned complicated operation, in order to select a desiredfunction.

Since the conventional functional selecting method must be alsonecessarily equipped with a key button for selecting a function, theconventional functional selecting method requests an additional moldingoperation for each key button. Accordingly, this additional moldingoperation causes to make its manufacturing process complicated and toincrease its manufacturing unit price. Also, a settled area occupied bythe key pad restricts to the size and design of the digital device.

Beside that, there can be provided a touch screen method through adisplay unit as the function selecting method. However, this method alsoleads to the increase of its manufacturing cost due to the equipment ofa display unit capable of the touch screen.

SUMMARY

Accordingly, the present invention provides a device and method capableof non-contactly selecting a function that can allow a user to moreeasily and quickly select a function by remote-controlling a menufunction by use of a camera.

The prevent invention provides a device and method capable ofnon-contactly selecting a function that can evoke user's interest,beyond the conventional simple function selecting method through the keybutton.

The prevent invention provides a device and method capable ofnon-contactly selecting a function that can maximize making the most useof elements by allowing an equipped camera to be universally used.

The prevent invention provides a device and method capable ofnon-contactly selecting a function that can reduce a manufacturing costfor a key pad and make its size minimized and its design varied bymaking the best use of the internal space of a digital device.

The prevent invention provides a device and method capable ofnon-contactly selecting a function that can determine a moving width ofa pointer according to the distance spaced with directing means.

The prevent invention provides a device and method capable ofnon-contactly selecting a function that can not only reduce amanufacturing cost of a digital device by removing a key pad but alsomake its size minimized and its design varied by making the best use ofthe internal space of the digital device.

Other problems that the present invention solves will become moreapparent through the following description.

To solve the above problems, an aspect of the present invention featuresan image signal processor, an application processor and a digitalprocessing device, for performing a non-contact function.

According to an embodiment of the present invention, a digital devicehaving a photographing function can include a light source, emittinglight to an outside; a camera unit, generating and outputting a videosignal corresponding to an external video; a video data generating unit,generating video data corresponding to the video signal; and an identityunit, detecting a location of a detected area formed by light, reflectedby pointing-means and inputted, of the light emitted from the video datain units of each frame, recognizing a moving locus of the detected areaby comparing at least two continuous frames and generating andoutputting corresponding change information. Here, the changeinformation is used as an input signal for function control and displaycontrol of the digital processing device.

It can be displayed on the change information that any one of aplurality of information items, displayed on a display unit of thedigital processing device, is selected, or a mouse cursor movingcorresponding to the change information can be displayed.

The identity unit can detect the size of the detected area, compare atleast two continuous frames and generate and output change informationcorresponding to the size change of the detected area.

If the size of the detected area is changed by the pointing-means movedin a first direction, the change information can be recognized as aselecting command or an executing start command of an information item,corresponding to the moving locus, among a plurality of informationitems displayed on the display unit.

If the size of the detected area is changed by the pointing-means movedin a second direction reversely with respect to the first direction, thechange information can be recognized as a selection releasing command ofthe selected information item.

If the first direction and the second direction are vertically withrespect to the camera unit and the size of the detected area is changedat a rate identical to or larger than a predetermined rate, it can berecognized that the size of the detected area is changed.

If the size of the detected area is increased and then decreased or isdecreased and then increased at a rate identical to or larger than apredetermined rate, it is predetermined that the change information canbe recognized as a selection command of an information item located witha mouse cursor or a selection releasing command of a selectedinformation item among a plurality of information items displayed on thedisplay unit.

If the size of the detected area is increased and then decreased or isdecreased and then increased repeatedly twice or more at a rateidentical to or larger than a predetermined rate, the change informationcan be recognized as an executing start command of an information itemlocated with a mouse cursor among a plurality of information itemsdisplayed on the display unit.

Also, the identity unit can detect the size of a first detected area anda second detected area in units of each frame corresponding to aplurality of pointing-means, respectively, compare at least twocontinuous frames and generate and output change informationcorresponding to the size changes of the first detected area and thesecond area.

If the size of the first detected area is increased and then decreasedor is decreased and then increased at a rate identical to or larger thana predetermined rate, the change information can be recognized as aselection command of an information item located with a mouse cursor ora selection releasing command of a selected information item among aplurality of information items displayed on the display unit.

If the size of the second detected area is increased and then decreasedor is decreased and then increased at a rate identical to or larger thana predetermined rate, the change information can be recognized as anoption information displaying command of an information item locatedwith a mouse cursor among a plurality of information items displayed onthe display unit.

If the size of the first detected area is increased and then decreasedor is decreased and then increased repeatedly twice or more at a rateidentical to or larger than a predetermined rate, the change informationcan be recognized as an executing start command of an information itemlocated with a mouse cursor among a plurality of information itemsdisplayed on the display unit.

The size of the detected area can be the area size of a figure formed byan outline of the detected area or the number of a pixel included in thedetected area.

The light source can emit light having a predetermined wavelength orluminance to an outside. The identity unit can detect a location of thedetected area from the video data by using the wavelength or theluminance.

The device can further include a key input unit, having at least one keybutton. Here, the light source, the camera unit and the identity unitcan start their driving by the input of a predetermined key button.

The video data can be YUV data or RGB data

According to another embodiment of the present invention, an imagesignal processor can include a video data generating unit, generatingvideo data corresponding to a video signal inputted from an imagesensor; and an identity unit, detecting a location of a detected areaformed by a predetermined light component from the video data in unitsof each frame, recognizing a moving locus of the detected area bycomparing at least two continuous frames and generating and outputtingcorresponding change information. Here, the detected area can be formedby light, reflected by pointing-means and inputted, of light emitted toan outside by a light source.

The change information can be used as an input signal for functioncontrol and display control of the digital processing device includingthe image signal processor.

The identity unit can detect the size of the detected area, compare atleast two continuous frames and generate and output change informationcorresponding to the size change of the detected area.

If the size of the detected area is changed by the pointing-means movedin a first direction, the change information can be recognized as aselecting command or an executing start command of an information item,corresponding to the moving locus, among a plurality of informationitems displayed on the display unit.

If the size of the detected area is changed by the pointing-means movedin a second direction reversely with respect to the first direction, thechange information can be recognized as a selection releasing command ofthe selected information item.

If the first direction and the second direction are vertically withrespect to the camera unit and the size of the detected area is changedat a rate identical to or larger than a predetermined rate, it canrecognized that the size of the detected area is changed.

If the size of the detected area is increased and then decreased or isdecreased and then increased at a rate identical to or larger than apredetermined rate, the change information can be recognized as aselection command of an information item located with a mouse cursor ora selection releasing command of a selected information item among aplurality of information items displayed on the display unit.

If the size of the detected area is increased and then decreased or isdecreased and then increased repeatedly twice or more at a rateidentical to or larger than a predetermined rate, the change informationcan be recognized as an executing start command of an information itemlocated with a mouse cursor among a plurality of information itemsdisplayed on the display unit.

Also, the identity unit can detect the size of a first detected area anda second detected area in units of each frame corresponding to aplurality of pointing-means, respectively, compare at least twocontinuous frames and generate and output change informationcorresponding to the size changes of the first detected area and thesecond area.

If the size of the first detected area is increased and then decreasedor is decreased and then increased at a rate identical to or larger thana predetermined rate, the change information can be recognized as aselection command of an information item located with a mouse cursor ora selection releasing command of a selected information item among aplurality of information items displayed on the display unit.

If the size of the second detected area is increased and then decreasedor is decreased and then increased at a rate identical to or larger thana predetermined rate, the change information can be recognized as anoption information displaying command of an information item locatedwith a mouse cursor among a plurality of information items displayed onthe display unit.

If the size of the first detected area is increased and then decreasedor is decreased and then increased repeatedly twice or more at a rateidentical to or larger than a predetermined rate, the change informationcan be recognized as an executing start command of an information itemlocated with a mouse cursor among a plurality of information itemsdisplayed on the display unit.

The size of the detected area can be the area size of a figure formed byan outline of the detected area or the number of a pixel included in thedetected area.

The light source emits light having a predetermined wavelength orluminance to an outside. The identity unit detects a location of thedetected area from the video data by using the wavelength or theluminance.

According to another embodiment of the present invention, an applicationprocessor can include a receiving unit, receiving video data generatedcorresponding to an outside video signal from an image signal processor;an identity unit, detecting a location of a detected area formed by apredetermined light component from the video data in units of eachframe, recognizing a moving locus of the detected area by comparing atleast two continuous frames and generating and outputting correspondingchange information. Here, the detected area can be formed by light,reflected by pointing-means and inputted, of light emitted to an outsideby a light source.

The change information can be used as an input signal for functioncontrol and display control of the digital processing device includingthe image signal processor and the application processor.

The identity unit can detect the size of the detected area, compare atleast two continuous frames and generate and output change informationcorresponding to the size change of the detected area.

If the size of the detected area is changed by the pointing-means movedin a first direction, the change information can be recognized as aselecting command or an executing start command of an information item,corresponding to the moving locus, among a plurality of informationitems displayed on the display unit.

If the size of the detected area is changed by the pointing-means movedin a second direction reversely with respect to the first direction, thechange information can be recognized as a selection releasing command ofthe selected information item.

If the first direction and the second direction are vertically withrespect to the camera unit and the size of the detected area is changedat a rate identical to or larger than a predetermined rate, it can berecognized that the size of the detected area is changed.

If the size of the detected area is increased and then decreased or isdecreased and then increased at a rate identical to or larger than apredetermined rate, the change information can be recognized as aselection command of an information item located with a mouse cursor ora selection releasing command of a selected information item among aplurality of information items displayed on the display unit.

If the size of the detected area is increased and then decreased or isdecreased and then increased repeatedly twice or more at a rateidentical to or larger than a predetermined rate, the change informationcan be recognized as an executing start command of an information itemlocated with a mouse cursor among a plurality of information itemsdisplayed on the display unit.

Also, the identity unit can detect the size of a first detected area anda second detected area in units of each frame corresponding to aplurality of pointing-means, respectively, compare at least twocontinuous frames and generate and output change informationcorresponding to the size changes of the first detected area and thesecond area.

If the size of the first detected area is increased and then decreasedor is decreased and then increased at a rate identical to or larger thana predetermined rate, the change information can be recognized as aselection command of an information item located with a mouse cursor ora selection releasing command of a selected information item among aplurality of information items displayed on the display unit.

If the size of the second detected area is increased and then decreasedor is decreased and then increased at a rate identical to or larger thana predetermined rate, the change information can be recognized as anoption information displaying command of an information item locatedwith a mouse cursor among a plurality of information items displayed onthe display unit.

If the size of the first detected area is increased and then decreasedor is decreased and then increased repeatedly twice or more at a rateidentical to or larger than a predetermined rate, the change informationcan be recognized as an executing start command of an information itemlocated with a mouse cursor among a plurality of information itemsdisplayed on the display unit.

The size of the detected area can be the area size of a figure formed byan outline of the detected area or the number of a pixel included in thedetected area.

The light source emits light having a predetermined wavelength orluminance to an outside. The identity unit detects a location of thedetected area from the video data by using the wavelength or theluminance.

According to another embodiment of the present invention, a digitalprocessing device having a photographing function can include a cameraunit, generating video data corresponding to an external video; and anidentity unit, detecting the size of a detected area from the video datain units of each frame, recognizing the size change of the detected areaby comparing at least two continuous frames and generating andoutputting corresponding change information. Here, a moving width of apointer, displayed on a display unit of the digital processing device,can be determined by the change information

According to another embodiment of the present invention, a digitalprocessing device having a photographing function can include a lightsource, emitting light to an outside; a camera unit, generating andoutputting a video signal corresponding to an external video; a videodata generating unit, generating video data corresponding to the videosignal; and an identity unit, detecting a location and size of adetected area formed by light, reflected by pointing-means and inputted,of the light emitted from the video data in units of each frame,recognizing a moving locus and size change of the detected area bycomparing at least two continuous frames and generating and outputtingcorresponding change information. Here, the pointer, the moving width ofwhich is determined by the change information corresponding to the sizechange, can be displayed on a display unit of the digital processingdevice

It can be predetermined that the moving width is increased or decreasedby the increasing or the decreasing of the area.

If the size of the area is changed in a rate identical to or larger thana predetermined rate per unit time, it can be predetermined that thechange information is recognized as a selecting command or a releasingcommand of an information item, located with the pointer, among aplurality of information items displayed on the display unit.

If the size of the area is changed in a rate identical to or larger thana predetermined rate per unit time and the increasing change and thedecreasing change are repeated n time, n being a natural number, it canbe predetermined that the change information is recognized as anexecuting start command or a releasing command of an information item,located with the pointer, among a plurality of information itemsdisplayed on the display unit.

The size of the detected area can be the area size of a figure formed byan outline of the detected area or the number of a pixel included in thedetected area.

The light emitted from the light source can include at least one of apredetermined wavelength and luminance.

The identity unit can detect a location and size of the detected areafrom the video data by using at least one of the wavelength and theluminance.

The light emitted from the light source can be the polarized light.

The device can further include a filter allowing light having anidentical phrase to the polarized light to penetrate through it. Here,the identity unit can detect the location and size of the detected areafrom the video data by using the light passing through the filter.

The device can further include a key input unit, having at least one keybutton. Here, the light source, the camera unit and the identity unitcan start their driving by the input of a predetermined key button.

The light source, the camera unit and the identity unit periodically canstart and stop their driving until the location of the detected area isdetected.

The video data is YUV data or RGB data.

According to another embodiment of the present invention, a digitalprocessing device can include an input unit, including at least one keybutton; a light source, emitting light to an outside; a camera unit,generating and outputting a video signal corresponding to an externalvideo; a video data generating unit, generating video data correspondingto the video signal; and an identity unit, detecting a location of adetected area formed by light, reflected by pointing-means and inputted,of the light emitted from the video data in units of each frame,recognizing a moving locus of the detected area by comparing at leasttwo continuous frames and generating and outputting corresponding changeinformation. Here, the pointer, the moving width of which is determinedby the input of a minute adjusting button, can be displayed on a displayunit of the digital processing device.

The identity unit can generate and output corresponding changeinformation by recognizing the size change of the detected area. Here,if the size of the area is changed in a rate identical to or larger thana predetermined rate per unit time, it can be predetermined that thechange information is recognized as a selecting command or a releasingcommand of an information item, located with the pointer, among aplurality of information items displayed on the display unit.

The size of the detected area can be the area size of a figure formed byan outline of the detected area or the number of a pixel included in thedetected area.

The input unit can further include a button for starting to drive thelight unit, the camera unit and the identity unit

The camera unit and the identity unit periodically can start and stoptheir driving until the location of the detected area is detected.

The video data can be YUV data or RGB data.

According to another embodiment of the present invention, an imagesignal processor can include a video data generating unit, generatingvideo data corresponding to a video signal inputted from an imagesensor; and an identity unit, detecting a location and size of adetected area formed by a predetermined light component from the videodata in units of each frame, recognizing a moving locus and size changeof the detected area by comparing at least two continuous frames andgenerating and outputting corresponding change information. Here, thedetected area can be formed by light, reflected by pointing-means andinputted, of light emitted to an outside by a light source.

The change information can be used as an input signal for controllingthe digital processing device including the image signal processor.

It can be predetermined that the moving width, displayed on a displayunit of the digital processing device, is increased or decreased by theincreasing or the decreasing of the area.

If the size of the area is changed in a rate identical to or larger thana predetermined rate per unit time, it can be predetermined that thechange information is recognized as a selecting command or an releasingcommand of an information item, located with the pointer of the displayunit, among a plurality of information items displayed on the displayunit.

If the size of the area is changed in a rate identical to or larger thana predetermined rate per unit time and the increasing change and thedecreasing change are repeated n time, n being a natural number, it canbe predetermined that the change information is recognized as anexecuting start command or a releasing command of an information item,located with the pointer of the display unit, among a plurality ofinformation items displayed on the display unit

The light emitted from the light source can include at least one of apredetermined wavelength and luminance.

The identity unit can detect a location and size of the detected areafrom the video data by using at least one of the wavelength and theluminance

The light emitted from the light source can be the polarized light

The identity unit can detect the location and size of the detected areafrom the video data by using the polarized light. Here, the polarizedlight can be light passing through a filter allowing light having anidentical phrase to the polarized light, included in the digitalprocessing device including the image signal processor, to penetratethrough it.

According to another embodiment of the present invention, an imagesignal processor can include a receiving unit, receiving video datagenerated corresponding to an outside video signal from an image signalprocessor; an identity unit, detecting a location and size of a detectedarea formed by a predetermined light component from the video data inunits of each frame, recognizing a moving locus and size change of thedetected area by comparing at least two continuous frames and generatingand outputting corresponding change information. Here, the detected areacan be formed by light, reflected by pointing-means and inputted, oflight emitted to an outside by a light source.

The change information can be used as an input signal for controllingthe digital processing device including the image signal processor andthe application processor.

It can be predetermined that the moving width, displayed on a displayunit of the digital processing device, is increased or decreased by theincreasing or the decreasing of the area.

If the size of the area is changed in a rate identical to or larger thana predetermined rate per unit time, it is predetermined that the changeinformation can be recognized as a selecting command or an releasingcommand of an information item, located with the pointer of the displayunit, among a plurality of information items displayed on the displayunit.

If the size of the area is changed in a rate identical to or larger thana predetermined rate per unit time and the increasing change and thedecreasing change are repeated n time, n being a natural number, it canbe predetermined that the change information is recognized as anexecuting start command or a releasing command of an information item,located with the pointer of the display unit, among a plurality ofinformation items displayed on the display unit.

The light emitted from the light source can include at least one of apredetermined wavelength and luminance

The identity unit can detect a location and size of the detected areafrom the video data by using at least one of the wavelength and theluminance.

The light emitted from the light source can be the polarized light.

The identity unit can detect the location and size of the detected areafrom the video data by using the polarized light. Here, the polarizedlight is light passing through a filter allowing light having anidentical phrase to the polarized light, included in the digitalprocessing device including the image signal processor, to penetratethrough it.

To solve the above problems, another aspect of the present inventionfeatures a method for performing a non-contact function mode and arecorded medium having recorded a program for executing the method.

According to an embodiment of the present invention, a method forperforming a non-contract function mode by a digital device having aphotographing function can include a light source emitting light to anoutside; a camera unit generating and outputting a video signalcorresponding to an external video; a video data generating unitgenerating video data corresponding to the video signal; and an identityunit detecting a location and size of a detected area formed by light,reflected by pointing-means and inputted, of the light emitted from thevideo data in units of each frame, recognizing a moving locus and sizechange of the detected area by comparing at least two continuous framesand generating and outputting corresponding change information. Here,the pointer, the moving width of which is determined by the changeinformation corresponding to the size change, can be displayed on adisplay unit of the digital processing device.

It can be predetermined that the moving width is increased or decreasedby the increasing or the decreasing of the area.

If the size of the area is changed in a rate identical to or larger thana predetermined rate per unit time, it can be predetermined that thechange information is recognized as a selecting command or a releasingcommand of an information item, located with the pointer, among aplurality of information items displayed on the display unit.

If the size of the area is changed in a rate identical to or larger thana predetermined rate per unit time and the increasing change and thedecreasing change are repeated n time, n being a natural number, it canbe predetermined that the change information is recognized as anexecuting start command or a releasing command of an information item,located with the pointer, among a plurality of information itemsdisplayed on the display unit.

The size of the detected area can be the area size of a figure formed byan outline of the detected area or the number of a pixel included in thedetected area.

The light emitted from the light source can include at least one of apredetermined wavelength and luminance.

The identity unit can detect a location and size of the detected areafrom the video data by using at least one of the wavelength and theluminance.

The light emitted from the light source can be the polarized light.

The digital processing device further can include a filter allowinglight having an identical phrase to the polarized light to penetratethrough it. Here, the identity unit can detect the location and size ofthe detected area from the video data by using the light passing throughthe filter.

The digital processing device can further include a key input unit,having at least one key button. Here, the light source, the camera unitand the identity unit can start their driving by the input of apredetermined key button.

The light source, the camera unit and the identity unit periodicallystart and stop their driving until the location of the detected area isdetected.

The video data can be YUV data or RGB data.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a block diagram illustrating a mobile communication terminalin accordance to an embodiment of the present invention;

FIG. 2 illustrates an external appearance of a mobile communicationterminal and a using state of a non-contact function mode in accordanceto an embodiment of the present invention;

FIG. 3 through FIG. 5 are examples illustrating an operating principleof a non-contact function mode in accordance to the present invention;

FIGS. 6 and 7 illustrate an external appearance of a mobilecommunication terminal and a using state of a non-contact function modein accordance to another embodiment of the present invention;

FIG. 8 is a flow chart illustrating a performing operation of anon-contact function mode of a mobile communication terminal inaccordance to an embodiment of the present invention;

FIG. 9 is an example illustrating an image mapping method between videodata and an item displaying area in accordance with an embodiment of thepresent invention;

FIG. 10 is an example illustrating a table of an image mapping programrealizing an image mapping method of FIG. 9;

FIG. 11 is an example illustrating a method for recognizing a functionnon-contactly selected by using an image mapping method of FIG. 9;

FIG. 12 illustrates an external appearance of a digital processingdevice and a using state of a non-contact mouse function mode inaccordance with another embodiment of the present invention;

FIG. 13 illustrates a using state of a non-contact mouse function modeof a digital processing device in accordance with another embodiment ofthe present invention;

FIG. 14 is an example illustrating a principle of moving a mouse cursoraccording to a non-contact mouse function of FIG. 13;

FIG. 15 is an example illustrating an operating principle of anon-contract mouse function in accordance with the present invention;

FIG. 16 is a flow chart illustrating a menu selecting method by using anon-contact mouse function in accordance with another embodiment of thepresent invention; and

FIG. 17 is a flow chart illustrating a menu selecting method by using anon-contact mouse function in accordance with another embodiment of thepresent invention.

DETAILED DESCRIPTION

The above objects, features and advantages will become more apparentthrough the below description with reference to the accompanyingdrawings.

Since there can be a variety of permutations and embodiments of thepresent invention, certain embodiments will be illustrated and describedwith reference to the accompanying drawings. This, however, is by nomeans to restrict the present invention to certain embodiments, andshall be construed as including all permutations, equivalents andsubstitutes covered by the spirit and scope of the present invention.Throughout the drawings, similar elements are given similar referencenumerals. Throughout the description of the present invention, whendescribing a certain technology is determined to evade the point of thepresent invention, the pertinent detailed description will be omitted.

Terms such as “first” and “second” can be used in describing variouselements, but the above elements shall not be restricted to the aboveterms. The above terms are used only to distinguish one element from theother. For instance, the first element can be named the second element,and vice versa, without departing the scope of claims of the presentinvention. The term “and/or” shall include the combination of aplurality of listed items or any of the plurality of listed items.

When one element is described as being “connected” or “accessed” toanother element, it shall be construed as being connected or accessed tothe other element directly but also as possibly having another elementin between. On the other hand, if one element is described as being“directly connected” or “directly accessed” to another element, it shallbe construed that there is no other element in between.

The terms used in the description are intended to describe certainembodiments only, and shall by no means restrict the present invention.Unless clearly used otherwise, expressions in the singular numberinclude a plural meaning. In the present description, an expression suchas “comprising” or “consisting of” is intended to designate acharacteristic, a number, a step, an operation, an element, a part orcombinations thereof, and shall not be construed to preclude anypresence or possibility of one or more other characteristics, numbers,steps, operations, elements, parts or combinations thereof.

Unless otherwise defined, all terms, including technical terms andscientific terms, used herein have the same meaning as how they aregenerally understood by those of ordinary skill in the art to which theinvention pertains. Any term that is defined in a general dictionaryshall be construed to have the same meaning in the context of therelevant art, and, unless otherwise defined explicitly, shall not beinterpreted to have an idealistic or excessively formalistic meaning.

Hereinafter, preferred embodiments will be described in detail withreference to the accompanying drawings. Identical or correspondingelements will be given the same reference numerals, regardless of thefigure number, and any redundant description of the identical orcorresponding elements will not be repeated.

The present invention can be applied to the case that a portableterminal, such as a portable phone and a PDA, is equipped with a camera,but not necessarily limited thereto. Any person of ordinary skill in theart must understand that an image tilt correction method in accordancewith an embodiment of the present invention can be applied to even acamera device.

Of course, the inventive spirit suggested by the present invention canbe applied to all digital devices having camera functions without anyrestriction. For example, the present invention can be used for adigital home appliance, such as a TV, a refrigerator, a digital cameraand a computer, and a variety of digital communication devices. The blowdescription is based on a mobile communication terminal, a digitalcamera or a portable multimedia device, which is one of therepresentative digital devices, and is referred to as a “digitalprocessing device.” However, since the present invention can be appliedto an universal digital processing device, for the convenience ofdescription, the terms designating the digital processing device can bedescribed by being replaced with a terms designating a particularelectronic device

Also, this description discloses the invention that can adjust a movingwidth of a pointer for recognizing the size change of detected area oneach frame photographed through a camera unit. In case that thedetecting object is similar to a circle (e.g. an end part of a finger),the detecting object can be recognized by analyzing an area formed bybeing inputted with the light, emitted from an edge direction or anadditional light source, that has been reflected by the pertinentobject. A location change of the detected area (or a center point) canbe used in order to recognize the location change of a position pointedby the pointer, and the size change of the detected area on each framecan be used in order to adjust a moving width of the pointer.

Related to this, the description is based on the method for controllingthe moving width of the pointer by analyzing an area formed by beinginputted with the light, emitted from an additional light source, thathas been reflected by the pertinent object. However, any person ofordinary skill in the art can easily understand that the presentinvention is not limited to this method, and can be applied to allmethods capable of being recognized by a method predetermined with adetected area from each frame.

FIG. 1 is a block diagram illustrating a mobile communication terminalin accordance to an embodiment of the present invention.

Here, each block of FIG. 1 can be merely the block illustrated byseparating a performing operation of a digital processing device 100 pereach function for the convenience of description. Accordingly, at least2 blocks can be integrated and realized as one chip. As necessary, itshall be also obvious that it can be embodied by being separated intomore blocks.

Referring to FIG. 1, the digital processing device 100 includes adisplay unit 110, a camera unit 120, a video processing unit 125, a keyinput unit 130, a light source 140, a processor 150 and a memory unit155. In case that the illustrated digital processing device 100 is amobile communication terminal, it shall be obvious that the digitalprocessing device 100 can further include a wireless communication unit,performing a wireless function, and a transmitting and receiving unit,inputting and outputting voice data, which are not shown. Also, thecamera unit 120 and the video processing unit 125 can be referred to asthe camera unit 120 for the convenience.

The key input 130 provides a user interface, for inputting data (e.g.character data and/or numerical data) or selecting a menu function.However, since the present invention supports selecting a non-contactfunction, some or all of a plurality of key buttons provided on theconventional digital processing device can be omitted.

The key input unit 130 will be hereinafter described with reference toFIG. 2 in detail. In accordance with the present invention, a key buttonand/or menu item, for performing a non-contact function mode (i.e. forinputting a control command by using a moving locus of light or an areaformed by light, the light having been emitted from the light source 140and being reflected by a photographic subject (e.g. an end part of afinger) and inputted into the camera unit 120), can be pre-designated. Auser can allow the digital processing device 100 to be under anon-contact function mode by selecting the pertinent key button and/ormenu item. If the digital processing device 100 is under the non-contactfunction mode, for example, the light source unit 140, the camera unit120 and the video processing unit 125 can be controlled to functioncorresponding to the non-contact function mode.

The camera unit 120 can include a lens unit, an image sensor unit and asignal processing unit. The lens unit (not shown) gathers the lightreflected by the photographic subject, and the image sensor unit (notshown) converts a gathered optical video signal into an electrical videosignal (e.g. an analog video signal) and outputs the converted videosignal. The signal processing unit (not shown) converts the electricalvideo signal, inputted from the image sensor unit, a digital videosignal and outputs the converted video signal. Also, in case that thelight emitted from the light source is polarized light, the camera unit120 can further include a filter (not shown) for allowing an externalvideo having the same phrase as the polarized light only to penetratethrough the camera unit 120. In this case, the filtering of the externalvideo can be performed before the image sensor unit converts theexternal video into the electrical signal or can be performed in a formof extracting a particular component from the converted video signal.

Here, a charge coupled device (CCD) sensor or a complementarymetal-oxide semiconductor (CMOS) sensor can be used for the image sensorunit, and the signal processing unit can employ a digital signalprocessor (DSP).

The video processing unit 125 performs various processing operations ofthe video data, inputted from the camera unit 120, or video data, storedin a below-described memory unit 155. For example, the video processingunit 125 can performs the video processing, such as the compression andrecovering of the video data, the adjustment of size or brightness(luminance) of the video data, the interpolation between pixels of thevideo data, the gamma correction or chrominance correction of the videodata and the format conversion converting RGB video data into YUV videodata. The video processing unit 125 can be integrated with theaforementioned signal processing unit and can be included as an elementof the camera unit 120.

The video processing unit 125 can further include an identity unit (notshown) for identifying the moving locus or size change of an area(hereinafter, referred to as a ‘detected area’) formed by the light,which has been emitted from the light source 140, reflected bypointing-means (e.g. a finger located at regular intervals before thelens unit) by using the RGB data and the YUV data.

As described below with reference to FIG. 15, the detected area can bepartitioned into a plurality of sections such as a first detected areaand a second detected area. At this time, the first detected area andthe second detected area can be partitioned for different usages,respectively, and can identify each change of detected areas. Forexample, in order to function as a mouse, the change of the firstdetected area can be recognized as the manipulation of a left button ofthe mouse, and the change of the second detected area can be recognizedas the manipulation of a right button of the mouse. In case that theidentity unit is included in the processor 150, the change of thedetected area can be identified by the processor 150.

In case that the change of the detected area is identified by theprocessor 150, it shall be obvious that the identity unit can beincluded in the processor 150. The detected area can be recognized bydetecting the wavelength component of the light, emitted from the lightsource 140, from video data of each frame processed by the videoprocessing unit 140. For this, the wavelength of the light, emitted fromthe light source 140, must be predetermined according to the type of theequipped light source. The wavelength band for detecting can bepredetermined. Also, in case that the light emitted from the lightsource 140 is polarized light, the detected area can be more clearlyrecognized by firstly filtering an external video, having a differentphrase from polarized light, from external videos and by relativelyincreasing the magnitude of the wavelength, identical to the lightemitted from the light source 140, of the external video. For example,in case that the light emitted from the light source 140 is infraredlight, the external video can be filtered by a filter for allowing theonly infrared light to penetrate through it.

The identifying operation of the change of the detected area can beperformed in the operation that the digital processing device 100functions as a preview mode. The preview mode refers to the executingmode displaying a video signal, inputted in real-time through the cameraunit 120 as visual information. A user can check the visual informationdisplayed on the display unit 110 in the preview mode. Then, the usercan generate encoded image data corresponding to the external video byselecting a predetermined button (e.g. a shutter button) and write thegenerated image data in a memory unit 155 (i.e. execute a capture mode).The reason that the identifying operation of the change of the detectedarea is performed in the preview mode is that video information relatedto not only a current frame but also earlier frames, which are acomparison object, is requested in order to identify the moving locus ofthe detected area or the size change of the formed area. For this, thevideo processing unit 125 can include a memory for storing videoinformation related to each frame (or analysis information analyzing theproperties (e.g. location and size) of the detected area in thepertinent frame).

The video processing unit 125 can be divided into an image signalprocessor and a back end chip (or application processor). The imagesignal processor converts a video signal, inputted from the camera unit120, into YUV data and outputs the converted YUV data to the backendchip. The backend chip can converts the inputted YUV data into JPEG orBMP data by a predetermined encoding method, to store the converted datain the memory unit 155 or decode the image data in the memory unit 155to display it on the display unit 110. Of course, the functiongenerating image data by a predetermined encoding method can beperformed by the image signal processor. The aforementioned identityunit can be included in the image signal processor or the backend chip.

The light source 140 emits light having a particular wavelength by aparticular control signal (e.g. a control signal for starting anon-contact function mode) of the processor 150. The wavelength of thelight, emitted from the light source 140, can be predetermined. Throughthis, the detected area can be easily recognized by using a filterallowing a light component, corresponding to the pertinent wavelength,to penetrate through it. Also, the light emitted from the light source140 can be light polarized by a particular wavelength and/or aparticular phrase. Through this, the detected area can be easilyrecognized by using a filter allowing only light component having adirection identical to the polarized phrase to penetrate through it. Thelight emitted from the light source 140 is preferably determined aslight having no harmful properties for a human being.

The light emitted from the light source 140 can be inputted into thecamera unit 120 by being reflected by pointing-means (e.g. user'sfinger), which is the photographic subject. For this, a light emittingangle of the light source 140 can predetermined as the angle, the lightemitted at which is reflected by the pointing-means such that the lightcan be inputted through the lens unit of the camera unit. Alternatively,the light emitting angle of the light source 140 can be realized suchthat a user can adjust the angle by using the key input unit 130, forexample. It shall be obvious that the light source 140 can employvarious emitting device (e.g. light emitting diode (LED)) according to arealizing method without any restriction. For example, the light source140 can be an infrared LED. Also, in case that the identity unit detectsa location of the detected area from the video data by using polarizedlight, it is obvious that it is requested to additionally be equippedwith means for polarizing the light, emitted from the light source 140,that is, the emitting device in a particular direction. The light source140 can stop emitting light by a particular control signal (e.g. acontrol signal for stopping the non-contact function mode) of theprocessor 150.

The display unit 110 displays various data including an operating stateof the digital processing device 100, character data (or numerical data)inputted through the key input unit 130 and video data stored in thebelow-described memory unit 155. For example, in case that a userselects the non-contact function mode, the display unit 110 can displaya menu icon, corresponding to various kinds of menu functions equippedin the digital processing device 100, and/or a mouse cursor for themovement to the menu icon. The display unit can be realized as a liquidcrystal display (LCD) or an organic light emitting diode (OLED), forexample. The display unit 110 can further include an additional displaymemory temporally storing various data to be displayed.

The aforementioned light source 140 and display unit 120 will be belowdescribed with reference to FIG. 2 in more detail.

The memory unit 155 can store various kinds of input data includingvideo data, various programs requested for the general operation orfunctional driving of the digital processing device 100. Particularly,the memory unit 155 in accordance with the present invention can storean image mapping program for analyzing a function non-contactly selectedby a user. The memory unit 155 can be embodied as an integrated memoryor by being separated into a plurality of memory units (e.g. a programmemory, a data memory and a video memory).

The processor 150 controls a general operation of the digital processingdevice 100. For example, the processor 150 can control to receivevarious kinds of data, such as input data, inputted the key input unit130, and video data, stored in the memory unit 155 and to display thedata through display unit 110.

The processor 150 can also control the photographing of the camera unit120, the video processing of the video processing unit 125 and theoperating of the light source 140. For example, in the case of beinginputted with a key button for selecting the start/stop of thenon-contact function mode, the processor 150 can control the operationsof the camera unit 120, the video processing unit 125 and the lightsource 140, corresponding to the performance or completion of thenon-contact function mode.

Beside that, the processor 150 can realize a non-contact mouse functionby detecting an area (hereinafter, is called ‘a detected area’)photographed by pointing-means in the video data inputted from thecamera unit 120 and by recognizing the location change of the detectedarea according to the input order of the video data. The realization ofthe non-contract mouse function will concretized through the descriptionrelated to the below drawings.

In addition, the processor 150 can periodically (e.g. every 0.1 second)control the camera unit 120, the video processing unit 125 and the lightsource 140 to be driven, to check whether to perform the non-contactfunction mode and if valid movement (e.g. horizontally movement orvertically movement) is detected through, for example, the camera unit120, can control to perform the contact function mode sustainedly afterthat. Conversely, if no valid movement is detected, the processor 150controls to perform a sleep mode (or a standby mode). If the non-contactfunction mode starts to be operated, it can be checked everypredetermined checking period (e.g. every 10 second) whether the validmovement is inputted to determine whether to maintain the operation ofthe pertinent mode. If no valid movement is inputted, the processor 150can control to stop the non-contact function mode. Of course, it shallbe obvious that the automatically started operation of the non-contactfunction mode can be stopped by inputting a predetermined key button.

In case that a user inputs a command (e.g. a minute moving command of apointer) controlling a moving width of a pointer that moves on displayunit 110 through predetermined input means (e.g. a key button or a sidekey 132), the processor 150 can control the moving width of the pointerregardless of a distance spaced with pointing-means.

Also, as described above, in case that the identity unit is included inthe processor 150, the processor 150 can recognize the change of thedetected area by using successive video data processed by the videoprocessing unit and control the operation of a corresponding element toperforin a control operation (e.g. an operation moving the location ofthe pointer displayed on the display unit 110 for menu selection)corresponding to a user control command inputted by the non-contactfunction mode. For example, the processor 150 runs an image mappingprogram stored in the memory. Then, the processor 150 can recognize amenu function corresponding to a location (i.e. a location of a detectedarea) non-contactly selected by a user by using the run image mappingprogram.

Beside that, the processor 150 can recognize the size of the detectedarea by using the successive video data processed by the videoprocessing unit 125 and identify a distance (i.e. a distance spacedbetween the pointing-means and the camera unit, and hereinafter, iscalled ‘spaced distance’) formed with the detected area. In this case,the moving width of the pointer moving on the display unit 110 can bevariously adjusted according to the identity distance. For example, incase that the spaced distance is decreased (i.e. the size of thedetected area is increased), the moving width of the pointer can becontrolled to be increased. Conversely, in case that the spaced distanceis increased (i.e. the size of the detected area is decreased), theminute adjustment can be performed by controlling to decrease the movingwidth of the pointer. Of course, the rate increasing or decreasing thesize of the detected area can be predetermined to select/releaseinformation item located with the pointer or to identify it from anexecuting command. The rate can be also adjusted differently accordingto the user. This will be described below in detail.

Of course, as described above, recognition information related to thechange of the detected area (e.g. information related to the change of amoving locus or a size of the formed area) can recognized by the videoprocessing unit 125, and thus, a corresponding control signal can beinputted into the processor 150.

The method for recognizing the non-contactly selected function by theprocessor 150 or the video processing unit 125 by using the imagemapping program will be hereinafter described in detail with referenceto FIG. 9 through FIG. 11.

FIG. 2 illustrates an external appearance of a mobile communicationterminal and a using state of a non-contact function mode in accordanceto an embodiment of the present invention.

Although FIG. 2 illustrates a folder type mobile communication terminalas the digital processing device 100, it shall be obviously that thedigital processing device 100 can be various types (e.g. a flip type anda slide type) of the mobile communication terminal.

Also, even though FIG. 2 illustrates that the camera unit 120 (i.e. thelens unit exposed to an outside) is equipped with the light sources 140,respectively, in each opposite part, one by one, the number of themountable light sources is not limited. For example, four light sources140 can be mounted in four sides, respectively, based on the camera unit120. Alternatively, three light sources 140 can be provided in angularpoints, respectively, of a regular triangle, the middle point of whichthe camera unit 120 is located at.

Beside that, the light source 140 can be omitted in a specific case. Forexample, in case that it can be possible to input a control command inthe non-contact function mode in accordance with the present inventionby using pointing-means (e.g. pointing-means realized as a stylus pen)including a light-emitting unit capable of emitting light having aspecific wavelength and/or luminance (hereinafter, referred to as a‘wavelength’) to an end part, the light source 140 can be omitted. Thisis because the change of the detected area can be identified byanalyzing a location and/or range of a pixel, corresponding to thewavelength of light emitted from the light-emitting unit equipped in thepointing-means, in the video data of each frame inputted through thecamera unit 120 and processed by the video processing unit 125. However,the below description is based on the case that the light source 140 isprovided in the digital processing device 100.

Here, the location equipped with the camera unit 120 can be differentfrom that illustrated by FIG. 2. Of course, the camera unit 120 can bemixably used for general video photographing as well as the performanceof the non-contact function mode in accordance with the presentinvention. In this case, it can be necessary to identify whether theoperation of the camera unit 120 or the video processing unit 125 aimsto execute the non-contact function mode or to photograph a typicalvideo. This is to restrict to the losing of the unnecessary power and tothe decreasing of the processing efficiency by performing an onlyoperation for recognizing the change of the detected area withoutnecessary to perform all processes for which the video processing unit125 displays a preview video on the display unit 110. For this, theprocessor 150 can provide a control signal corresponding to how to use avideo signal currently inputted into the camera unit 120 and/or thevideo processing unit 125. For example, in case that a user directs toexecute the non-contact function mode, the non-contact function mode canbe executed instead of the typical video photographing by transferringto a particular control signal corresponding to the non-contact functionmode to the camera unit 120 and/or the processing unit 125. Similarly,in case that the user directs the general video photographing function,the losing of the unnecessary power and the decreasing of the processingefficiency can be restricted because all processing operations foranalyzing the detected area and recognizing its change is not performedby transferring to a particular control signal corresponding to thephotographing of the typical video to the camera unit 120 and/or theprocessing unit 125. However, the below description is based on thefunctions of the camera unit 120 and/or the processing unit 125 when thenon-contact function mode is performed.

Referring to FIG. 2, the digital processing device 100 in accordancewith an embodiment of the present invention includes the display unit110, the camera unit 120, the key input unit 130 and the light sourceunit 140.

The light source 140 can emit light, having a particular wavelength or aparticular wavelength and simultaneously polarization of a particularphrase, to an outside. The light emitted from the light source 140 isreflected by pointing-means 200 (e.g. an end part of a user's finger),and the reflected light is inputted through the lens unit of the cameraunit 120. Accordingly, as described above, a light emitting angle of thelight source 140 is preferably predetermined as the angle, the lightemitted at which is reflected by the pointing-means 200, regularlyspaced away from the digital processing device 100, such that the lightcan be inputted through the camera unit 120.

Here, the light source 140 can be controlled to be operated only ifthere is a direction by the processor 150. For example, in case that auser directs to execute the non-contact function mode by selecting apredetermined button of key buttons mounted on the key input unit 130(i.e. pressing a ‘menu button 131’ or a ‘side key 132’ during apredetermined period of time) or selecting a predetermined menu item,the processor 150 can control the light source 140 to be turned on.Also, in case that the user directs to stop the non-contact functionmode by a similar method, the processor 150 can control the light source140 to be turned off. This makes it possible to prevent unnecessarypower loss of a battery that can be generated by emitting light all thetime because the light source 140 has always been turned on. Also, asdescribed above, the processor unit 150 can periodically (e.g. every 0.1second) the camera unit 120, the video processing unit 125 and the lightsource 140 to be driven.

Beside that, the processor 150 will be able to control the photographingfunction of the camera unit 120 by the same method. In other words, inthe case of executing a typical photographing function (i.e. a previewmode or a capture mode), the processor 150 can control the analyzing ofthe detected area and the recognizing of its change, by the videoprocessing unit 125 or the identity unit, not to be performed.

Of course, in case that the digital processing device 100 in accordancewith the present invention is equipped with an additional movingrecognizing sensor (e.g. a motion sensor), the digital processing device100 can use the moving recognizing sensor to select the non-contactfunction mode. In other words, if a user takes a particular action (e.g.waves a hand twice within 1 second), the moving recognizing sensorsenses the action and transfers a sensing signal to the processor 150,At this time, the processor 150 can control the operations of the lightsource 140, the camera unit 120 and/or the video processing unit 125 bydetermining that the user selects the non-contact function mode throughthe transferred sensing signal.

However, the below description assumes that it is determined through themenu button of the key input unit 130 whether to select the non-contactfunction mode and that the light source 140 and the camera unit 120 arecontrolled to be operated in the only case of selecting the non-contractfunction mode. The identity unit, included in the video processing unit125 or the processor 150, performing to analyze the detected area and torecognize its change will be controlled to be operated in the only caseof executing the non-contact function mode. The below descriptionassumes that the identity unit is included in the video processing unit125.

The camera unit 120 generates in real-time and outputs a video signalcorresponding to an external video. The video signal is inputted intothe video processing unit 125 and converted into video data in a formatfor generating recognition information related to the change of thedetected area (e.g. information related to a moving locus or the sizechange of a formed area). The converted video data in the format can beany one of YUV data and RGB data, for example. The identity unitrecognizes the detected area by using the converted video data andgenerates recognition information related to the change (e.g. theinformation related to the moving locus or the size change of the formedarea) by recognizing the difference between a current frame and anearlier frame, to input it into the processor 150. The aforementioneddetected area can be recognized by using the video data inputted inreal-time as a preview mode type or by using continuously photographedvideo data (a capture mode type). However, in the case of the latter,its processing speed can be slow because photographed video data (e.g.video data encoded according to a predetermined compressing standardsuch as JPEG and MPEG) corresponding to an outside video is generated.

The key input 130 provides a user interface, for inputting characterdata and/or numerical data. Also, as described above, a user can set thestart/stop of the non-contact function mode by a predetermined keybutton of the key input unit 130. For example, the key buttons, forselecting the start/stop of the non-contact function mode, can bepredetermined differently from each other. Of course, the key buttons,for selecting the start/stop of the non-contact function mode, can bedesignated as the same key button and be alternately used so as toselect the start or release according to the number of the same keybutton to be pressed. Alternatively, it can be predetermined that thenon-contact function mode is performed only while a pre-designatedbutton is pressed. Also, as described above, it can be determined by thecontrol of the processor 150 instead of the pressing of thepre-designated key button whether to start/release the non-contactfunction mode.

Beside that, although the present invention suggests the method that themoving width of the pointer is automatically controlled by using thesize of the detected area according to the spaced distance, the userwill be able to control the moving width of the pointer moving on thedisplay unit 110 by using a pre-designated key button or the side key132 of the key input unit 130. For example, it can be predetermined thatthe pointer can make a minute movement regardless of a distance for withthe detected area, only while a predetermined button is pressed.

Since the digital processing device 100 in accordance with the presentinvention can select an information item (e.g. each information item,such as telephone and screen setting, illustrated in FIG. 2) by usingthe non-contact function mode in order to direct to start the execution,as illustrated in FIG. 2, various kinds of functional buttons (e.g. atelephone call button and an Internet access button), for selecting theinformation item, and/or a direction key button, for moving theinformation item, can be omitted in the key pad.

Of course, some functional buttons, necessary for providing theconvenience to a user or performing a function (e.g. a power turn-onfunction of the digital processing device), which is unable to berecognized through the non-contact function mode in accordance with thepresent invention, can be included in the key pad. In other words, itshall be obvious that the structure and type of the key input unit 130in accordance with the present invention, which must be determined byversatilely considering the requirement of a user, the convenience offunction selecting, and the efficiency of the design of the digitalprocessing device, can be varied in addition to the type illustrated inFIG. 2. This is why the type having some functional buttons (e.g. themenu button 131 and the power button 133) as well as buttons forinputting character and numerical data is illustrated in the case of thekey input unit 130 of FIG. 2.

As described above, the digital processing device 100 capable ofexecuting the non-contact function mode in accordance with the presentinvention can minimize the digital processing device and makes itpossible to vary its design because the digital processing device 100can remove the space as much as that occupied by the functional button,for example, or use the space for another usage. Of course, it shall beobvious that various functional buttons, which can be omitted, can beincluded in the key pad, for the convenience of the user.

In case that a user directs to execute the non-contract function mode,the display unit 110 of the present invention can display theinformation items on the whole part or some part (hereinafter, referredto as an ‘information item display section 111’ of a screen. Forexample, in case that the user directs to perform the non-contactfunction mode by selecting a predetermined button or menu item of thekey input unit 130, an initial screen, displayed through the displayunit 110, can be converted into a screen including the information itemdisplay section 111, illustrated in FIG. 2. Of course, it is obviousthat the screen, itself, including the information item display section111 can be used as the initial screen, or the method for forming theinitial screen can be variously applied. The below description assumesthat the information item display section 111 is displayed on the wholepart of the display unit 110 in case that the non-contact function modeis performed.

Beside that, although the information item display section 111 can bedisplayed with all information items designated to individually executeall functions, the below description assumes the case of beingpartitioned into 9 partitioned sections and displayed as illustrated inFIG. 2. Like this, in case that the information item display section 111is partitioned into 9 partitioned sections as illustrated in FIG. 2, andthe information items corresponding to each function are displayed, theuser can select more favorite 9 functions from all kinds of functionsmounted on the digital processing device and allow the 9 functions to bedisplayed.

Accordingly, in the digital processing device 100, capable of executingthe non-contact function mode, in accordance with the present invention,the information item display section 111, displayed on the display unit110, can be displayed with a predetermined information item or aninformation selected by the user. For example, the selection of theinformation items can be possible by being mounted with a button forchanging the information items through a space, occupied by the keyinput unit 130, or an additional space, or by allowing thealready-mounted key button to be used for a pertinent usage.

FIG. 3 through FIG. 5 are examples illustrating an operating principleof a non-contact function mode in accordance to the present invention.FIG. 3 through FIG. 5 illustrate the operation that a user executes anon-contact function in accordance with the present invention by usingpointing-means 200 after the execution of the non-contract function modeis started by the user.

Here, an object capable of being used as the pointing-means is notlimited, and any object that can reflect light emitted from the lightsource 140 and input the reflected light to the camera unit 120 issufficient. However, the below description assumes that thepointing-means is a user's finger. For the convenience of description,the FIG. 3 and FIG. 4 separately illustrate the camera unit 120 ofdevices capable of selecting the non-contact function in accordance withthe present invention.

The user directs to execute the non-contract function mode. Then, auser's finger is located in front of and separately from the camera unit120. In this case, the light, having a specific wavelength or a specificwavelength and simultaneously polarization in a specific direction,emitted from the light source 140 is reflected by the user's finger andinputted into the camera unit 120. The optical video information,inputted into the camera unit 120 is converted into a video signal andinputted into the video processing unit 125. The video processing unit125 converts the inputted video signal into video data for analyzing thedetected area and/or recognizing its change. The converted video datacan be any one of YUV data and RGB data, for example. A view angle ofthe camera unit 120 and a light-emitting angle of the light source 140can be predetermined. For example, the angle of the camera unit 120 andthe light-emitting angle of the light source 140, respectively, are setas 120 degree. The angle and/or the light-emitting angle can bevariously changed.

At this time, the light, reflected by the finger, of the light, havingthe specific wavelength or the specific wavelength and simultaneouslypolarization in the specific direction, emitted from the light source140, forms as a video on the lens unit. An area formed by the reflectedlight will include information, separated from another part of an inputvideo (e.g. different wavelength or luminance). Change information (e.g.a moving locus and/or the size of a formed area) of the detected areabetween successive frames can be recognized by recognizing the detectedarea formed by the light reflected from the video data of each frame.Accordingly, the detected area will be formed corresponding to themoving locus and/or the moving direction of the finger.

For example, the identity unit can determine the detected area andrecognize the change information of the detected area between each frameby performing a filtering operation allowing an only area of a specificwavelength to be detected. Alternatively, the identity unit candetermine the detected area and recognize the change information of thedetected area between each frame by detecting an area having a specificluminance component from the video data of each frame. Also, theidentity unit will be able to determine the detected area and recognizethe change information of the detected area between each frame byfiltering the light polarized in a specific direction or a specificcomponent (e.g. wavelength or luminance) of the video information andthen by detecting an area having a specific wavelength or a specificluminance component. The valid range of the wavelength or luminance fordetermining the detected area can be predetermined, and the detectedarea can be determined by recognizing a location of pixels correspondingto a wavelength component or a luminance component within a pertinentrange.

Here, the moving locus of the detected area can be recognized by using,for example, information related to how the center point of the detectedarea, formed by the reflected light, is changed in each frame.

The size of the formed area of the detected area can be recognized byusing, for example, the area size of a figure formed by an outline ofthe detected area in the video data of each frame or the number ofpixels included in the detected area.

In case that the formed area size of the aforementioned detected area isdifferent between frames, the different detected area between can berecognized as press/release. For example, while any one menu item (e.g.‘telephone’ of FIG. 2) is increased and displayed on display unit 110,or a pointer points to any one menu item, if the size of the detectedarea is increased (i.e. a finger moves toward the lens unit) within apredetermined period of time, it can be recognized that the pertinentmenu item is selected (pressed). Alternatively, while any one menu item(e.g. ‘telephone’ of FIG. 2) is increased and displayed on display unit110, or a pointer points to any one menu item, if the size of thedetected area is decreased (i.e. a finger moves reversely toward thelens unit) within a predetermined period of time, it can be recognizedthat the pertinent menu item is released.

The increase or decrease of the formed area size of the detected areacan be determined by comparing the formed area size calculated by pereach frame unit between continuous frames. However, in the only case ofincreasing or decreasing the size of the detected area at a rateidentical to or larger than a predetermined rate, it can be recognizedthat the size change of the detected area must be recognized aspress/release. Here, in the case of changing the size of the detectedarea at a rate smaller than a predetermined rate, the size change willbe used only for pointing-means to recognize the change of a spaceddistance. In this case, the recognized distance will be used to adjust amoving width of a pointer corresponding to the distance.

As compared with FIG. 3, in the case of FIG. 4, the user's finger islocated closer to lens unit of the camera unit 120. If it is assumedthat the user's finger moves from the location of FIG. 3 to the locationof FIG. 4, the detected area formed by the light reflected by the user'sfinger is increasing in size. In this case, the identity unit generatescorresponding recognition information and inputs the generatedrecognition information into the processor 150, and the processor 150determines whether the size of the detected area is changed at a rateidentical to or larger than a predetermined rate (e.g. the changednumber of pixels included in the detected area within a predeterminedtime). If it is determined that the size of the detected area is changedat a rate identical to or larger than a predetermined rate, it can berecognized as a command selecting the information item located with thepointer. However, if the size of the detected area is changed at a ratesmaller than a predetermined rate, it can be recognized as an onlycommand decreasing the moving width of the pointer corresponding to anarea formed with the detected area. Also, it shall be obvious that theselecting command and the moving width decreasing command are separatedfrom each other, these commands can be mutual-overlappedly applied.

Then, the processor 150, which has recognized that the detected areaformed by the light reflected by the user's finger is increasing, canrecognize a pertinent information item (e.g. a menu icon) and drive afunction (or application) corresponding to a pertinent menu item.However, if the non-contact function mode is used while the user'sfinger is regularly spaced away from the lens unit, since the locationof the finger can be upwardly or downwardly changed within a regulardistance without intention, the standard (i.e. selecting range) forrecognizing the change as pressing can be predetermined. Here, theselecting range can be predetermined as a distance before the cameraunit 120 by its manufacturer. Through this, the user can select orexecute a corresponding menu item by taking an action such as pretendingto press an imaginary key button provided above the lens unit of thecamera unit 120. At this time, the processor 150 can determine whetherthe user selects a non-contact function through the comparison of thearea formed in each video frame according to a location of the finger.In other words, in case that the size of the area, formed by themovement of the finger, in the inputted video is increasing accordingthe successive order of each video frame, the processor 150 will be ableto consider that the user intends to select a menu item and icon.

Reversely, if it is assumed that the user's finger moves from thelocation of FIG. 4 to the location of FIG. 3, the detected area formedby the light reflected by the user's finger is decreasing in each frame.In this case, the identity unit generates corresponding recognitioninformation and the generated recognition information to the processor150, and the processor 150 determines whether the size of the detectedarea is changed at a rate identical to or larger than a predeterminedrate. If it is determined that the size of the detected area is changedat a rate identical to or larger than a predetermined rate, theprocessor 150 can recognize the size change as a selection releasingcommand of an information item located with the pointer. However, if thesize of the detected area is changed at a rate smaller than apredetermined rate, the size change will be recognized as an onlycommand increasing the moving width of the pointer corresponding to anarea formed with the detected area

Also, in case that the formed area size of the detected area isrepeatedly increased and decreased at a rate identical to or larger thana predetermined rate (e.g. in case that pointing-means continuouslychanges a distance spaced away from the camera unit n times, n being anatural number), the processor 150 can consider the repeated size changeas an executing start command or a releasing command of a selectedinformation item and drive a function (or application) corresponding toa pertinent information item. However, if the non-contact function modeis used while the user's finger is regularly spaced away from the lensunit, since the location of the finger can be upwardly or downwardlychanged within a regular distance without intention, the standard (i.e.selecting range) for recognizing the change as a selecting command, aselection releasing command or an executing start command can bepredetermined.

Here, the selecting range can be predetermined as a distance before thecamera unit 120 by its manufacturer. Through this, the user can select,release or execute the information item located with the pointer bytaking an action such as pretending to press an imaginary key buttonprovided in an upper part of the lens unit of the camera unit 120.

The principle for selecting the non-contact function in accordance withthe present invention will become more apparent through the belowdescription related to FIG. 5.

Referring to FIG. 5, the point corresponding to a reference number 500refers to an end part of the user's finger for the convenience ofdescription. Also, arrows corresponding to a reference number 510 andanother reference number 520 indicate horizontal movement of the endpart of the finger by the user. Another arrow corresponding to areference number 530 indicates vertical movement of the end part of thefinger. Of course, although the end part of the finger can berotationally (clockwise or anticlockwise) moved, the pertinentdescription will be omitted.

Here, the horizontal movement (including rotational movement) indicatesall moving locus of the end part of the user's finger moved in a regular(or within error range) vertical distance from a plane equipped with thelens unit of the camera unit 120. Accordingly, although FIG. 5illustrates only leftward and rightward movement (reference number 510)and upper and lower movement (reference 520), the horizontal movement isnot limited thereto. Of course, the horizontal movement can includevarious loci and directions according to the movement of the end part ofthe finger, such as rotational movement.

The vertical movement indicates the user's action allowing the finger'send part to move closely or remotely from the plane equipped with thelens unit of the camera unit 120. In other words, the vertical movementindicates the user pretending to press or release an imaginary keybutton for selecting a function, provided in a space within a selectionrange in front of the camera unit 120.

The moving locus and the formed area size according to the horizontalmovement and the vertical movement are analyzed through video datacorresponding external videos continuously inputted through the cameraunit 120. In other words, the identity unit can recognize the changes ofthe moving locus and the formed area size by analyzing video datacorresponding to each frame continuously inputted. As described above,for example, the center point of the detected area can be used whenanalyzing the formed area size, and the area size of a figure formed bythe outline or the number of pixels included in the detected area can beused when analyzing the formed area size.

At this time, an information displaying status of the display unit 110can be changed and displayed according to the recognized moving locus ofthe end part of the user's finger. For example, when the non-contactfunction mode in accordance with the present invention is started, if apointer similar to a mouse pointer is displayed on the display unit 110,the pointer can be moved and displayed corresponding to the moving locusof the detected area. Beside that, as illustrated in FIG. 2, in casethat the selected information item (e.g. a menu icon) is relativelyenlarged and displayed, an information item corresponding to therecognized moving locus of the detected area is allowed to be relativelyenlarged and displayed (e.g. if it is recognized that the detected arealeftward moves, the left-located information item is allowed to beenlarged and displayed). Of course, the method for displaying theinformation item corresponding to the moving locus of the detected areacan be variously provided as using different color or font size or asbeing turned on and off, for example.

Accordingly, the user can allow the pointer to be moved and located atan information item corresponding to a function desired to be selected,released or executed (or the information item to be selected) byhorizontally or rotationally moving the end part of the finger in adirection toward the information item.

In this case, the information items in the information item display area111 can be also separately displayed (moved) one after another by makingthe identical locus corresponding to the moving locus of the finger'send part in the inputted video of each frame. Through this, the user cannon-contactly select a desired function more quickly and exactly. Also,as described above, the moving width of the pointer can be allowed to bedetermined corresponding to the distance (e.g. the distance between thefinger's end part and the camera unit) formed with the detected area.

In case that the user attempts to select a desired information item, thepointer is allowed to be located at the information item through theaforementioned operations. Then, the finger's end part is allowed tomove within the selecting range like the reference number 530 of FIG. 5.The vertical moving operation corresponds to the user's operationpretending to press a key button, through which the processor 150 canrecognize that the information item located with the pointer is selectedby the user. In this case, the pertinent item can be displayed with itsdifferent color or font size in order to display that the informationitem is selected. Of course, as described above, the size of thedetected area must be changed at a rate identical to or larger than apredetermined rate in order that the processor 150 can recognize thechange as the selecting command of the information item.

Beside that, the user can execute to release a selected information itemby using the non-contact function mode. In case that the user, who hasselected at least one information item, attempts to release some of theselected items, the user can the pointer on the selected informationitem and then release the information item by moving the finger's endpart in a reverse direction of the reference number 530. This can bedetermined by recognizing that the formed area size of the detected areais decreasing in the continuous frame. Similarly, as described above,the size of the detected area must be changed at a rate identical to orlarger than a predetermined rate in order that the processor 150 canrecognize the change as the selection releasing command of the selectedinformation item.

The case that the user releases the selected information item or theselected functional menu will be described blow by making an example ofthe operation that the user deletes contact information stored in atelephone book. To collectively delete a plurality of contactinformation, the plurality of contact information can be selected (e.g.selected by determining any one contact information and by performing apressing operation) by the aforementioned method. Then, in the case ofbeing desired to release any one of the selected contact information tostore the desired contact information, the selection of the desiredcontact information can be released by allowing the pointer, forexample, to be located at the desired contact information and then thefinger's end part to move in a reverse direction of the reference 530.This will be able to be determined by recognizing that the formed areasize of the detected area is decreasing in the continuous frame.

Here, the processor unit 150 can use the changed rate of the formed areasize of the detected area to more exactly determine whether to selectthe non-contact function. For example, in case that the changed rate persize of the area, photographed with the pointing-means in the inputtedarea of each frame inputted within a predetermined time, is the same asor larger than a predetermined range (rate), the processor 150recognizes the size change as being non-contractly selected with afunction (i.e. vertically movement) such as the pressing or releasingcommand.

It can be exactly determined whether to select the non-contract functionregardless of any type of the pointing-means, used by the user, by usingthe changed rate per size of the area. For example, in the case of usingpointing-means intrinsically having a light emitting unit provided inits end part, the size of the detected area will be increased ordecreased according to the decreasing or the increasing of the distancebetween the pointing-means and the camera unit 120. This is becausesince light, emitted from the light emitting unit intrinsically equippedin the pointing-means, is directly inputted to the camera unit 120, anarea detected with a specific brightness component in the inputted areacan be formed in proportion as e distance between the pointing-means andthe camera unit 120. Accordingly, if the changed rate of the size of thedetected area is used for this case, it can be exactly determinedwhether to select the non-contract function regardless of whether thesize of the detected area is increased or decreased according to thedecreasing of the distance between the pointing-means and the cameraunit 120

In addition, it shall be obvious that any method using the size changeand the location change of the area, occupied by the detected area,corresponding to the finger's end part in inputted video of each framecan be applied to the present invention regardless of its realizingmethod. For example, in case that the area, occupied by the detectedarea in each video frame inputted within a predetermined period of timeis increased and then decreased in a rate identical to or larger than apredetermined rate as the user takes an action such as pretending toclick a button with his or her finger, this case will be recognized asbeing selected with the non-contact function. In other words, for thecase, it is determined that if the user completes the action, allowingthe pointing-means to be located inside a predetermined selecting rangeand then to be located outside the selecting range, within apredetermined period of time, the non-contact function is selected.

Also, the user can input an executing command of an information itemlocated with the pointer by using the non-contacting function mode. Theuser can execute a desired information item, by locating the pointer onthe desired information item and moving the finger's end part in adirection of the reference number 530 and then moving the finger's endpart reversely in the direction of the reference number 530. This can bedetermined by recognizing that the formed area size of the detected areais gradually increasing and then is continuously decreasing in thecontinuous frame. Of course, the size of the detected area must bechanged at a rate identical to or larger than a predetermined rate inorder that the processor 150 can recognize the change as the executingcommand of the information item.

The change of the distance formed with the detected area is accompaniedin the operation performed with the selecting, releasing or executingcommand of the aforementioned information item. In this case, the movingwidth of the pointer is determined corresponding to the distance formedwith the detected area. The user can move his or her finger in adirection of the reference number 530 and reversely in the direction ofthe reference number 530 in order to a moving width for horizontalmovement of the pointer. The distance formed with the detected area canbe measured by recognizing the change of the formed area size of thedetected area in the continuous frames. Of course, in case that the usermoves his or her finger, for example, in a direction of the referencenumber 530 to minutely adjust the moving width of the pointer, it shallbe obvious that the size of the area must be changed at a rate smallerthan the rate, determined to be recognized as the selecting command, inorder to identify the minute adjustment separately from the selectingcommand of the information item. In the meantime, the moving width ofthe pointer can be increased by moving his or her finger, for example,reversely in a direction of the reference number 530. Since theadjusting of the moving width of the pointer is separated from thehorizontal movement of the pointer, both of them can be simultaneouslyperformed.

The moving width of the pointer can be controlled regardless of thedistance formed with the detected area by another method for controllingthe moving width in accordance with another embodiment of the presentinvention. Only in case that the user inputs a pointer moving widthcontrolling command through input means (e.g. the side key 132 of amobile communication terminal) equipped in the digital processing device100, the moving width can be differently controlled. For example, thepointer can be allowed to be minutely moved while the user presses theside key 132 equipped in the digital processing device 100. Of course,the moving width of the pointer can be allowed to be increased.Alternatively, if the side key 132 is pressed one time, the pointer canbe allowed to be minutely moved, and if the side key 132 is pressedagain one time, the minute movement of the pointer can be released.

FIGS. 6 and 7 illustrate an external appearance of a mobilecommunication terminal and a using state of a non-contact function modein accordance to another embodiment of the present invention.

Referring to FIG. 6 instead of FIG. 2, the camera unit 120 and the keyinput 130 are located on a predetermined space in a key pad. Of course,in this case, the principle of selecting the non-contact function inaccordance with the present invention can be applied to the presentinvention. However, by arranging the camera unit 120 and the lightsource 140 as illustrated in FIG. 6, some operations of theaforementioned operations for selecting the non-contact function can beomitted.

For example, a focus of the camera unit 120 and a light emitting angleof the light source 140 can be predetermined such that imaginary keybuttons formed on a space in a selecting range can one-to-one correspondto a location of each numerical button actually formed in the key pad.In this case, it will be unnecessary that the user horizontally move thefinger's end part to a location displayed with the desired function(information item). In other words, the user can select a pertinentfunction (telephone call function) by directly locating the finger's endpart on a numerical button (e.g. #1 button) identical to a pertinentnumber (e.g. 1 in the case of FIG. 2) corresponding to a desiredinformation item (e.g. telephone call icon).

Of course, it can be recognized as being selected with the pertinent keybutton the detected area has a size identical to or larger than apredetermined size corresponding to a location of each key button, asthe finger goes far away from the digital processing device 100 afterone key button is pressed, and then, a next key button is pressed whenkey buttons are typically pressed one after another. In other word, inthis case, all aforementioned operations of FIG. 3 through FIG. 5 can beperformed. However, since the horizontal moving locus of the finger'send part is shorten by the user, the effort of the processor 150according to the analyzing of the inputted video can be reduced a lot.

Unlike FIG. 6, FIG. 7 illustrates that the camera unit 120 and the lightsource 140 are not independently located on a predetermined space in thekey pad formed with the key input unit 130 but shares one key buttonarea. Since the camera unit 120 and the light source 140 are minimized,they can be formed on an area of one key button (e.g. #5 button),through which it can be unnecessary to occupy an additional area.

FIG. 8 is a flow chart illustrating a performing operation of anon-contact function mode of a mobile communication terminal inaccordance to an embodiment of the present invention.

In a step represented by S701, the user firstly directs to execute anon-contact function mode in the digital processing device 100 a methodsuch as pressing a predetermined button (e.g. a menu button) of the keyinput unit 130.

As described above, the processor 150 can control not only the start ofthe non-contact function mode but also an operation of at least one ofthe display unit 110, the camera unit 120, the video processing unit 125and the light source 140. For example, the processor 150 can direct tostart to output a video signal corresponding to an external video to thecamera unit 120 and direct to turn on the light source 140. Theprocessor 150 can also control an initial screen to be converted into ascreen including an information item displaying area 111 and to bedisplayed through the display unit 110. Here, the light source 140 emitslight having a specific wavelength and/or luminance, and the camera unit120 generates and outputs a video signal corresponding to a real-timeexternal video or continuously photographs a subject at intervals of apredetermined time. Here, the continuous photographing operation can beperformed by a preview mode receiving video information or a capturemode continuously photographing the subject.

In a step represented by S702, the user locates pointing-means, such asa finger, in front of the camera unit 120 and moves the pointing-meanshorizontally or vertically. A video signal corresponding to the movementof the pointing-means is generated and inputted into the videoprocessing unit 125. The video processing unit 125 generates and outputsvideo data for analyzing and generating change information (e.g. amoving locus and/or the size change of the formed area) of the detectedarea.

In a step represented by S703, the identity unit recognizes a locationand size of the detected area by analyzing video data, successivelyinputted, per each frame. As described above, the detected area isrecognized by analyzing an external video formed by the light, emittedfrom the light source 140, reflected by the pointing-means and inputtedinto the camera unit 120. Also, the detected area, as described above,the detected area can be recognized by the property of the light (e.g.wavelength and/or luminance) emitted from the light source 140.

In a step represented by S704, the identity unit recognizes a movinglocus (i.e. horizontal movement or vertical movement) by using themoving locus of the pointing means and the successive size change of theformed area, recognized through earlier steps in each video frame. Asdescribed above, the identity unit can recognize the horizontal movementof the pointing-means by using, for example, the location change of thecenter point of the detected area and the vertical movement of thepointing-means by using the size increasing (or change rate) of thedetected area. The identity unit, as described above, can perform therecognizing of the detected area and the generating of the changeinformation by using an image mapping program stored in the memory unit155. The method for recognizing a function non-contactly selected byusing the image mapping program will be described in detail withreference to FIG. 9 through FIG. 11.

In a step represented by S705, the processor 150 determines whether thepointing-means vertically moves in a rate identical to or larger than apredetermined rate (e.g. an increasing or decreasing rate of the areasize per unit time). As described above, it will be necessary for theprocessor unit to determine whether the pointing-means is horizontallymoved in order to determine, for example, whether a selected informationitem is changed to another item or whether a location of the pointermust be changed and displayed. This will be separately described belowwith reference to the pertinent drawings.

If the size of the detected area is changed at a rate identical to orlarger than a predetermined rate, since the size change is to select,release or execute an information item located with the pointer, theprocessor 150 controls each element to perform a processingcorresponding to the step represented by S707. For example, asillustrated in FIG. 2, when the pointer is located in the ‘telephone’area, if the pointing-means vertically moves in a direction of accessingthe lens unit, it can be displayed that the ‘telephone’ function isselected (e.g. the ‘telephone’ area can be enlarged or can havedifferent color font. Also, when the ‘telephone’ function is selected,if the pointing-means vertically moves in a direction of being far awayfrom the lens unit, it can be displayed that the ‘telephone’ function isreleased. If the two operations continuously performed, since the twooperations are to execute the information item located with the pointer,the processor 150 controls each element to perform a processingcorresponding to the step represented by S707. For example, the digitalprocessing device 100 functioning as a mobile communication terminalwill start a function mode for performing a telephone function.

If the size of the detected area is changed in a rate smaller than apredetermined rate, since the size change is to adjust a moving width ofthe pointer corresponding to the distance formed with the detected area,the processor 150 controls each element to perform a processingcorresponding to the step represented by S706. For example, if thepointing-means vertically moves in a direction of accessing the lensunit or makes a vertical movement including a horizontal movement, aminute movement can be made by decreasing the moving width of thepointer.

However, if the pointing-means horizontally moves, since the movement isto change a location of the pointer moving on the display unit 110, theprocessor 150 controls each element to perform a processingcorresponding to the step represented by S706. For example, asillustrated in FIG. 2, when the pointer is located in the ‘telephone’area, if the pointing-means horizontally right moves, the pointer willmove toward the ‘message.’ In this case, the moving width of the pointeris determined corresponding to the distance formed with the detectedarea. Also, the information item pointed by the pointer in thehorizontal moving operation of the pointer can be enlarged and displayedin order to more clearly display the information item pointed by thepointer. At this time, it shall be obvious that the information itempointed by the pointer must be displayed separately from being selectedwith the information item (e.g. a shadow processing of enlargedinformation item).

In a step represented by S708, the processor 150 can determine whetherthe non-contact function mode is ended. For example, the ending of thenon-contact function mode will be able to be performed by apredetermined functional button or the input of the menu item. If theending of the non-contact function mode is directed, the pertinent stepsare ended. Otherwise, the step represented by S703 is advanced again.

FIG. 9 is an example illustrating an image mapping method between videodata and an item displaying area in accordance with an embodiment of thepresent invention, FIG. 10 is an example illustrating a table of animage mapping program realizing an image mapping method of FIG. 9, andFIG. 11 is an example illustrating a method for recognizing a functionnon-contactly selected by using an image mapping method of FIG. 9.

Referring to FIG. 9, video data processed by the video processing unit125 has a regular size (e.g. m horizontal pixels and n vertical pixels).As such, it can be performed in advance with the operation convertingthe video data into data having the standardized size and type (e.g. thesize and type having pixel numbers identical to the information itemdisplay area 111) capable of being analyzed by the image mappingprogram, in order to exactly recognize coordinate information accordingto the movement of the pointing-means in the non-contact function mode.This conversion of the inputted video can be performed by the videoprocessing unit 125 or the identity unit by the control of the processor150.

In this case, not only the video data but also center point informationof the video data can be stored in a video memory. The center pointinformation can be used as reference information for allowing theidentity unit to receive a coordinate value corresponding to thedetected area in the video data. The center point information can bepredetermined as any one of each angular point information of theinputted video. Also, the coordinate information corresponding to thedetecting information can be the center point of the recognized detectedarea.

Here, the coordinate information (P11 through P33) of each partitionedarea partitioned with the video data can be determined to be one-to-onemapped to each function (information item).

FIG. 10 is a table illustrating the image mapping program fordetermining a coordinate of the detected area in the video data. Thebelow description related to the image mapping program is merely anexample.

Also, the table of FIG. 10 assumes that the information item displayingarea 111 is partitioned into 9 partial sections (i.e. a separatefunction). Accordingly, the image mapping program can be changedcorresponding to the number of the functions displayed on theinformation item displaying area. A coordinate plane of FIG. 11 assumesthat the angular point information in a left lower part is selected ascenter point information of the video data. Accordingly, the imagemapping program can be changed in the case of selecting another centerpoint information.

The method for recognizing the selecting of the non-contact functionthrough the image mapping program in accordance with the presentinvention will be hereinafter described with reference to FIG. 9 andFIG. 10. At this time, the coordinate of the detected area is indicatedas (x, y), the coordinate related to origin information (hereinafter,referred to as the ‘origin’) is determined as (0,0). Here, x refers to alength component value of a horizontal direction based on the origin(i.e. horizontal pixel numbers), and y refers to a length componentvalue of a vertical direction based on the origin (i.e. vertical pixelnumbers).

When x is between 0 and m/3, exclusive of 0 and m/3, if y is between 0and 3/n, exclusive of 0 and 3/n, the coordinate information related toall corresponding coordinate values (x, y) is recognized as P11, if y isbetween 3/n and 2° n./3, exclusive of 3/n and 2n/3, the coordinateinformation related to all corresponding coordinate values (x, y) isrecognized as P21, or if y is between 2n/3 and n, exclusive of 2n/3 andn, the coordinate information related to all corresponding coordinatevalues (x, y) is recognized as P31.

Also, when x is between m/3 and 2 m/3, exclusive of m/3 and 2 m/3, if yis between 0 and 3/n, exclusive of 0 and 3/n, the coordinate informationrelated to all corresponding coordinate values (x, y) is recognized asP12, if y is between 3/n and 2n/3, exclusive of 3/n and 2n/3, thecoordinate information related to all corresponding coordinate values(x, y) is recognized as P22, or if y is between 2n/3 and n, exclusive of2n/3 and n, the coordinate information related to all correspondingcoordinate values (x, y) is recognized as P32.

In addition, when x is between 2 m/3 and m, exclusive of 2 m/3 and m, ify is between 0 and 3/n, exclusive of 0 and 3/n, the coordinateinformation related to all corresponding coordinate values (x, y) isrecognized as P13, if y is between 3/n and 2n/3, exclusive of 3/n and2n/3, the coordinate information related to all corresponding coordinatevalues (x, y) is recognized as P23, or if y is between 2n/3 and n,exclusive of 2n/3 and n, the coordinate information related to allcorresponding coordinate values (x, y) is recognized as P33.

Accordingly, FIG. 11 illustrates that in the coordinate value (x, y) ofthe detected area (assumed as a block colored point), x is between 0 andm/3, exclusive of 0 and m/3 and y is between 2n/3 and n, exclusive of2n/3 and n. Accordingly, the processor 150 recognizes that the detectedarea is located in the P31 by using the imaging mapping program. Thus,the identity unit can input recognition information, for allowing aninformation item corresponding to the pertinent partitioned areainformation P31 to be designated and displayed (referring to FIG. 2)into the processor 150. When the pertinent information item isdesignated and displayed, if the size of the detected area is increasedat a rate identical to or larger than a predetermined rate, theprocessor 150 can recognize that the information item designated by therecognition information from the identity unit is selected. Also, whenthe pertinent information item is designated and displayed, if the sizeof the detected area is decreased at a rate identical to or larger thana predetermined rate, the processor 150 can recognize that theinformation item designated by the recognition information from theidentity unit is released. In addition, when the pertinent informationitem is designated and displayed, if the size of the detected area isincrease and then decreased at a rate identical to or larger than apredetermined rate (e.g. an action similar to the click of the mouse),the processor 150 will execute a function (a telephone call in the caseof FIG. 2) corresponding to the information item designated by therecognition information from the identity unit.

FIG. 12 illustrates an external appearance of a digital processingdevice and a using state of a non-contact mouse function mode inaccordance with another embodiment of the present invention.

Referring to FIG. 12, which illustrates a portable multimedia device asan example of the digital device 100, the portable multimedia device caninclude the display unit 110, the camera unit 120, the input unit 130and the light source 140.

Even though FIG. 2 illustrates that the camera unit 120 (i.e. the lensunit exposed to an outside) is equipped with the light sources 140,respectively, in each opposite part, one by one, the number of themountable light sources is not limited.

Also, the light source 140 can be omitted in a specific case. Forexample, in case that it can be possible to input a control command inthe non-contact function mode in accordance with the present inventionby using pointing-means (e.g. pointing-means realized as a stylus pen)including a light-emitting unit capable of emitting light having aspecific wavelength and/or luminance to an end part, the light source140 can be omitted. This is because the change of the detected area canbe identified by analyzing a location and/or range of a pixel,corresponding to the wavelength of light emitted from the light-emittingunit equipped in the pointing-means, in the video data of each frameinputted through the camera unit 120 and processed by the videoprocessing unit 125. However, the below description is based on the casethat the light source 140 is provided in the digital processing device100.

Here, the location equipped with the camera unit 120 can be differentfrom that illustrated by FIG. 2. Of course, the camera unit 120 can bemixably used for general video photographing as well as the performanceof the non-contact function mode in accordance with the presentinvention. However, the below description is based on the case that thecamera unit 120 is used for performing the non-contact mouse function.This is because the photographing usage of the camera unit 120 can beeasily separated by separating a control signal transferred from theprocessor 150. This is to restrict to the losing of the unnecessarypower and to the decreasing of the processing efficiency by performingan only operation for recognizing the change of the detected areawithout necessary to perforin all processes for which the videoprocessing unit 125 displays a preview video on the display unit 110.For this, the processor 150 can provide a control signal correspondingto how to use a video signal currently inputted into the camera unit 120and/or the video processing unit 125. For example, in case that a userdirects to execute the non-contact function mode, the non-contactfunction mode can be executed instead of the typical video photographingby transferring to a particular control signal corresponding to thenon-contact function mode to the camera unit 120 and/or the processingunit 125. Similarly, in case that the user directs the general videophotographing function, the losing of the unnecessary power and thedecreasing of the processing efficiency can be restricted because allprocessing operations for analyzing the detected area and recognizingits change is not performed by transferring to a particular controlsignal corresponding to the photographing of the typical video to thecamera unit 120 and/or the processing unit 125. The light source 140emits light having a specific wavelength at a predeterminedlight-emitting angle. The emitted light is reflected by pointing-means200 (e.g. an end part of a user's finger) and gathered into the cameraunit 120. Accordingly, a light emitting angle of the light source 140 ispreferably predetermined as the angle, the light emitted at which isreflected by the pointing-means 200, regularly spaced away from theportable multimedia device 100, such that the light can be inputtedthrough the camera unit 120 (referring to FIG. 3 and FIG. 4).

Here, the light source 140 can be controlled to be operated only ifthere is a direction by the processor 150. For example, only if the userselects the non-contact mouse function mode by pressing a ‘mouse’ button1210 of the input unit 130, the processor 150 can control the lightsource 140 to be turned on. This makes it possible to preventunnecessary power loss of a battery that can be generated by emittinglight all the time because the light source 140 has always been turnedon. The operation (photographing) of the camera unit 120 will be alsoable to be controlled by the same method. In other word, a video of thepointing-means through the camera unit 120 can be controlled to beinputted only if the non-contact mouse function mode is selected.

Of course, in case that the digital processing device 100 in accordancewith the present invention is equipped with an additional movingrecognizing sensor (e.g. a motion sensor), the digital processing device100 can use the moving recognizing sensor to select the non-contactfunction mode. In other words, if a user takes a particular action (e.g.waves a hand twice within 1 second), the moving recognizing sensorsenses the action and transfers a sensing signal to the processor 150,At this time, the processor 150 can control the operations of the lightsource 140, the camera unit 120 and/or the video processing unit 125 bydetermining that the user selects the non-contact function mode throughthe transferred sensing signal.

However, the below description assumes that it is determined through themouse button 1210 of the input unit 130 whether to select thenon-contact mouse function mode and that the light source 140 and thecamera unit 120 are controlled to be operated in the only case of thestarting of the non-contract mouse function mode.

The camera unit 120 continuously photographs (e.g. performs a previewmode or continuous photographing in a capture mode) the pointing-meansat intervals of a predetermined time. The continuously photographedvideo data of each frame can be stored in the memory unit 155. As such,the processor 150 can recognize the non-contact mouse function accordingto a moving locus of the pointing-means by analyzing the correspondinginputted image of each frame. The method for recognizing the non-contactmouse function by analyzing the corresponding inputted image of eachframe will be described in detail with reference to the below drawings.Here, the inputted video can be RGB video data or YUV data, into whichthe RGB video data is converted by the video processing unit 125.

The input 130 provides a typical user interface, for inputting data orfor selecting a menu function. However, the input unit 130 illustratedin FIG. 12 is not equipped with various kinds of functional buttons(e.g. an Internet accessing button and a music playback button) forselecting a menu, provided on an input unit of a typical digital deviceand direction key buttons for menu moving. This is the reason why themenu function selection of the present invention can be performed byusing the non-contact mouse function.

Of course, some functional buttons, necessary for providing theconvenience to a user or performing a function (e.g. a power turn-onfunction of the digital processing device), which is unable to berecognized through the menu selection by using the non-contact mousefunction in accordance with the present invention, can be included inthe key pad. In other words, it shall be obvious that the structure andtype of the key input unit 130 in accordance with the present invention,which must be determined by versatilely considering the requirement of auser, the convenience of function selecting, and the efficiency of thedesign of the digital processing device, can be varied in addition tothe type illustrated in FIG. 12. Like this, the device having thenon-contact mouse function in accordance with the present invention canminimize the portable multimedia device and makes it possible to varyits design because the portable multimedia device can remove the spaceas much as that occupied by the functional button, for example, or usethe space for another usage.

In case that a user directs to start a non-contract mouse function mode,the display unit 110 of the present invention can display the menu iconson the whole part or some part (hereinafter, referred to as a ‘menu icondisplay area 1230’ of a screen. For example, when the non-contact mousefunction mode is started, at the same time, an initial screen of thedisplay unit 110 can be converted into a screen including the menu icondisplay area 1230, illustrated in FIG. 12. Of course, it is obvious thatthe screen, itself, including the menu icon display area 1230 can beused as the initial screen. The below description assumes that the wholepart of the display unit 110 is converted into the menu icon displayarea 1230 and displayed in case that the non-contact mouse function modeis selected.

Here, the menu icon display area 1230 can be displayed with whole partsor some parts of menu icons corresponding to each function equipped inthe digital processing device (e.g. portable multimedia device). Themenu icons in the menu icon display area 1230 can have various types andarrangements. It shall be obvious that the present invention is notlimited to the type and arrangement illustrated in FIG. 12.

Also, the menu icon display area 1230 can be further displayed with amouse cursor 1220 for moving to the menu icon and selecting the menuicon in addition to the menu icon. When the screen of the display unit110 is converted into the screen including the menu icon display area1230, at the same time, the mouse cursor 1220 can be displayed on apredetermined location. Alternatively, it can be predetermined that whenthe pointing-means is firstly detected from the inputted video, at thesame time, the mouse cursor 1220 is displayed on a location of the menuicon display area 1230 corresponding to the detected location. However,the below description assumes that the mouse cursor 1220 is displayed onthe menu icon display area 1230 by the latter (i.e. displayed, at thesame time, when the pointing-means is firstly detected from the inputtedvideo. Of course, the mouse cursor 1230, which is to make it easy forthe user to select any item (e.g. a menu item and an information item)displayed on a displaying screen, can allowed not to be displayed incase that the displaying order (e.g. a displaying type to be displayedas main information in order to activate a menu item located leftward orrightward from the currently-displayed menu item when the pointing-meansmoves leftward or rightward) of the menu item to be displayed in orderto be activated according to the moving locus of the pointing-means ispredetermined.

The mouse cursor 1220 moves in the menu icon display area 1230,corresponding to the movement (i.e. a moving locus) of thepointing-means in front of the camera unit 1220, with drawing the samelocus as the movement of the pointing-means. In other words, this canmake the same effect as if the user moves the mouse cursor 1220displayed on the screen by using a wire mouse, which can be realized byanalyzing the location change of an area photographed with thepointing-means in the inputted video successively generated from thecamera unit 120. The method for realizing the non-contact mouse functionwill become more apparent through the below description related to thepertinent drawings.

FIG. 13 illustrates a using state of a non-contact mouse function modeof a digital processing device in accordance with another embodiment ofthe present invention.

FIG. 13 illustrates that the user uses the non-contact mouse function inaccordance with the present invention by using the pointing-means 200after selecting the non-contact mouse function mode. FIG. 14 and FIG. 15also illustrate the same case. Any object is not required to meet aspecific condition in order to be used as the pointing-means 200.However, the description related to FIG. 13 through FIG. 15 assumes thatthe pointing-means is a user's finger.

Referring to FIG. 13, the point corresponding to a reference number 1300refers to an end part of the user's finger for the convenience ofdescription. Also, arrows corresponding to a reference number 1310 andanother reference number 1320 indicate horizontal movement of the endpart of the finger by the user. Another arrow corresponding to areference number 1330 indicates vertical movement of the end part of thefinger. For example, the vertical movement and the horizontal movement,respectively, can be identified by receiving a spaced distance betweenthe camera unit 120 and the pointing-means.

Here, the horizontal movement (including rotational movement) indicatesall moving locus of the end part of the user's finger outside of a clickselecting range, to be described below, based on a vertical distancefrom the camera unit 120. Accordingly, although FIG. 13 illustrates onlyleftward and rightward movement (reference number 1310) and upper andlower movement (reference 1320), the horizontal movement is not limitedthereto. Of course, the horizontal movement can include various loci anddirections (e.g. a parabola direction and rotation direction) accordingto the movement of the end part of the finger. If two fingers are usedas the pointing-means, the moving locus and direction of thepointing-means 200 can be recognized by assuming the moving canter pointof the pointing-means as the center point of an imaginary lineconnecting locations identically distanced from each end part of a firstfinger and a second finger and referring to the movement of the centerpoint.

The vertical movement indicates the user's action allowing the finger'send part located outside the click selecting range, to be describedbelow, to be located (e.g. gradual-closely or remotely) inside of aclick selecting range in front of the camera unit 120. In other words,the vertical movement can indicate the user pretending to click animaginary left or right button for selecting or releasing a menu orfunction, provided in a space in the predetermined click selecting rangein front of the camera unit 120. Beside that, if the vertical movementis repeated within a predetermined time, this can indicate the userpretending to double-click an imaginary left button for executing adesired function, provided in a space in the predetermined clickselecting range in front of the camera unit 120.

The camera unit 120 continuously photographs (e.g. performs a previewmode) the moving locus (i.e. the horizontal movement and the verticalmovement) of the finger's end part at intervals of a predetermined time.At this time, the processor 150 recognizes the moving locus of thefinger's end part from each video frame, continuously inputted from thecamera unit 120, by using the detected area of the finger's end part.The moving locus of the finger's end part, drawing the same locus, movesthe mouse cursor displayed through the menu icon display area 1230 ofthe display unit 110. Through this operation, the user can locate themouse cursor in a location of a desired menu icon. Beside that, the usercan select or release a pertinent menu icon corresponding to a desiredfunction or display its option information, by taking an action allowingthe finger's end part to be vertically moved (reference number 1330)from the pertinent location (i.e. the same action as clicking a left orright button of the imaginary mouse, and this can be used moreconveniently than the case of using end parts of a plurality of fingersand allowing the end part of any one finger to relatively be close). Themethod for using the non-contact mouse function will be described indetail with reference to FIG. 14.

FIG. 14 is an example illustrating a principle of moving a mouse cursoraccording to a non-contact mouse function of FIG. 13. In other word,FIG. 14 illustrates a principle of moving the mouse cursor 1220 on themenu icon display area 1230 according to the horizontal movement (i.e.the movement outside a predetermined click selecting range) of thefinger's end part.

Referring to FIG. 14, in accordance with the movement of the finger'send part (reference number 1300) in a predetermined direction by a user,the mouse cursor 1220, displayed on the menu icon display area 1230,also moves with drawing the same locus. In other words, the mouse cursor1220 of the menu icon display area 1230 moves according to a locuscorresponding to the location change of the detected area of thefinger's end part by the video inputting order of each frame inputtedfrom the camera unit 120.

The location change of the detected area of the finger's end part by thevideo inputting order of each frame is performed through the analyzingof the inputted video by the processor 150. In other words, theprocessor 150 can recognize the moving locus of the finger's end part byfirstly recognizing the location change of the detected area of thefinger's end part for each successively inputted video.

Here, the center point of an area detected with the finger's end partfrom the inputted video can be used to recognize the moving locus of thefinger's end part (i.e. the location change of the detected areaaccording to the order of the inputted video). For example, theprocessor 150 will be able to recognize the moving locus of the finger'send part by computing a location of the pixel located in the centerpoint of an area determined as being photographed by the finger's endpart every inputted video and recognizing the location change of thecenter point according to the order of the inputted video. Also, in casethat it is difficult to determine the center point of the finger's endpart because an area outside of the finger's end part is photographed,the processor 150 can recognize the moving locus of the finger's endpart by computing the pixel's location and its location change of thecenter point based on a first knuckle of the finger.

Beside that, in case that two fingers are used as the pointing-means theprocessor 150 can divide the area detected with each end part of a firstfinger and a second finger into a first detected area and a seconddetected area and assume the moving canter point of the movement as thecenter part of an imaginary line connecting the center points of an areaoccupied by each detected area, in order to determine a moving locus andarea size rate based on the center point the movement. If the inputtedvideo is photographed with an area outside of the end parts of the firstfinger and the second finger, it shall be obvious that the moving locusof the finger's end part can be determined based on the first knuckle ofthe finger. Also, although two fingers are used as the pointing-means,the center point of the first detected area can be used to determine themoving locus, based on the end part of the only first finger having moreclear detected area according to the setting of a designer.

Of course, at this time, the video of each frame, successively inputted,can be adjusted to respectively have an identical predetermined sizethrough the video processing unit 125 in accordance with the directionof the processor 150, in order to move the mouse cursor 1220, displayedon the menu icon display area 1230, identically according to the movinglocus of the finger's end part. For example, each inputted video can beadjusted to have the size having the same pixel number as the menu icondisplay area 1230.

FIG. 15 is an example illustrating an operating principle of anon-contract mouse function in accordance with the present invention.FIG. 15 illustrates the operation that a user executes a non-contactmouse function in accordance with the present invention by usingpointing-means 200 after the execution of the non-contract mousefunction mode is started by the user.

Here, an object capable of being used as the pointing-means is notlimited, and any object that can reflect light emitted from the lightsource 140 and input the reflected light to the camera unit 120 issufficient. However, the below description assumes that thepointing-means is a user's finger, for the convenience of description.This will be described with FIG. 3 and FIG. 4.

The user directs to execute the non-contract function mode. Then, auser's finger is located in front of and separately from the camera unit120. In this case, the light, having a specific wavelength, emitted fromthe light source 140 is reflected by the user's finger and inputted intothe camera unit 120. The optical video information, inputted into thecamera unit 120 is converted into a video signal and inputted into thevideo processing unit 125. The video processing unit 125 converts theinputted video signal into video data for analyzing the detected areaand recognizing its change. The converted video data can be any one ofYUV data and RGB data, for example. A view angle of the camera unit 120and a light-emitting angle of the light source 140 can be predetermined.For example, the angle of the camera unit 120 and the light-emittingangle of the light source 140, respectively, are set as 120 degree. Theangle and/or the light-emitting angle can be variously changed.

At this time, the light, reflected by the finger, of the light, havingthe specific wavelength, emitted from the light source 140, forms as avideo on the lens unit. An area formed by the reflected light willinclude information, separated from another part of an input video (e.g.different wavelength or luminance). Change information (e.g. a movinglocus and/or the size of a formed area) of the detected area betweensuccessive frames can be recognized by recognizing the detected areaformed by the light reflected from the video data of each frame.Accordingly, the detected area will be formed corresponding to themoving locus and/or the moving direction of the finger.

For example, the identity unit can determine the detected area andrecognize the change information of the detected area between each frameby performing a filtering operation allowing an only area of a specificwavelength to be detected. Alternatively, the identity unit candetermine the detected area and recognize the change information of thedetected area between each frame by detecting an area having a specificluminance component from the video data of each frame. The valid rangeof the wavelength or luminance for determining the detected area can bepredetermined, and the detected area can be determined by recognizing alocations of pixels corresponding to a wavelength component or aluminance component within a pertinent range.

Here, the moving locus of the detected area can be recognized by using,for example, information related to how the center point of the detectedarea, formed by the reflected light, is changed in each frame. The sizeof the formed area of the detected area can be recognized by using, forexample, the area size of a figure formed by an outline of the detectedarea in the video data of each frame or the number of pixels included inthe detected area.

In case that the formed area size of the aforementioned detected area isdifferent between frames, the different detected area between can berecognized as click or double-click. For example, while the mouse cursor1220 points to any one of a plurality of information items, displayed onthe display unit 110, if the size of the detected area is increased(i.e. a finger moves toward the lens unit) within a predetermined periodof time, it can be recognized that the pertinent information item isselected (clicked). Alternatively, while the mouse cursor 1220 points tothe selected information item in the display unit 110, if the size ofthe detected area is decreased (i.e. a finger moves reversely toward thelens unit) within a predetermined period of time, it can be recognizedthat the pertinent information item is released. For another example, incase that the user takes the same action as if the user clicks a buttonby using his or her finger while the mouse cursor 1220 points to any oneof a plurality of information items, displayed on the display unit 110,if the detected area in each video frame inputted within a predeterminedtime is increased and then decreased at a rate identical to or largerthan a predetermined rate, it can be recognized that the pertinentinformation item is selected or the selected information item isreleased (i.e. the same action as if a left button is clicked in amouse). The predetermined rate can be predetermined by a designer or theuser. For another example, in case that the user takes the same actionas if the user clicks a button by using his or her finger while themouse cursor 1220 points to any one of a plurality of information items,displayed on the display unit 110, if the detected area in each videoframe inputted within a predetermined time is repeated to be increasedand then to be decreased at a rate identical to or larger than apredetermined rate, it can be recognized that the pertinent informationitem is executed (i.e. the same action as if a left button isdouble-clicked in a mouse). The increasing or decreasing of formed areaof the detected area can be determined by comparing the formed areacomputed in units of each frame between continuous frames.

As described above, as compared with FIG. 3, in the case of FIG. 4, theuser's finger is located closer to lens unit of the camera unit 120. Ifit is assumed that the user's finger moves from the location of FIG. 3to the location of FIG. 4, the detected area formed by the lightreflected by the user's finger is increasing in size. In this case, theidentity unit generates corresponding recognition information and inputsthe generated recognition information into the processor 150, and theprocessor 150 can recognize the pertinent menu item as being selectedand allow a function (or application) corresponding to the pertinentmenu item to be driven. However, if the non-contact function mode isused while the user's finger is regularly spaced away from the lensunit, since the location of the finger can be upwardly or downwardlychanged within a regular distance without intention, the standard (i.e.selecting range) for recognizing the change as pressing can bepredetermined (in FIG. 4, in case that the finger is located within therange of b, it is assumed as pressing). Here, the selecting range can bepredetermined as a distance before the camera unit 120 by its designer.Through this, the user can select or execute a corresponding informationitem by taking an action such as pretending to press an imaginary keybutton provided above the lens unit of the camera unit 120. At thistime, the processor 150 determines whether the user selects anon-contact function through the comparison of the area formed in eachvideo frame according to a location of the finger. In other words, incase that the size of the area, formed by the movement of the finger, inthe inputted video is increasing according the successive order of eachvideo frame, the processor 150 can consider that the user intends toselect a menu item and icon. In order that although a size change rateof the detected area is large due to sloping horizontal movement outsideof a predetermined spaced distance, the size change is not recognized asthe vertical movement, the processor 150 determine can the vertical bymeasuring relative size rate and absolute spaced distance. Beside that,the processor 150 can determine whether it is vertically moved, byreferring to the reference of the absolute spaced distance determiningthe vertical movement and converting the distance coordinate of thedetected area of the inputted video frame (the converting from sphericalcoordinate system (, f,) to rectangular coordinate system (x, y, z)).

It can be possible by using the size change rate per area size toexactly the click selection using the non-contact mouse function,regardless of any type of the pointing-means used by the user and anysize of the used pointing-means.

Although it is determined as being clicked and selected that the size ofthe area photographed with the pointing-means is simply increased at arate identical to or larger than a predetermined range, of course, themethod for recognizing the click selection is not limited thereto. Inaddition, any method using the size change of the area photographed withthe pointing-means can be applied to the present invention regardless ofits realizing method.

FIG. 15 is an example illustrating the method for determining thevertical movement by separating the first detected area and the seconddetected area.

Referring to FIG. 15, some can be separated from the video dataincluding the detected area and displayed as a window 1530 on a part ofthe display unit 110 in order to determine the size change rate of thearea detected with the pointing-means for some part of the video dataprocessed by the video processing unit 125. As described above, in casethat a plurality of fingers are used as the pointing-means, the mousecursor 1220 can be displayed on a specific location (e.g. the centerlocation) recognized by the pertinent fingers. In this case, the window1530 can function as an information window allowing the user torecognize whether a left or right button is clicked. It shall bewell-known to any person of ordinary skill in the art that the displaylocation of the window 1530 is not limited.

As such, it can be performed in advance with the operation convertingsome of the video data including the detected area into data having apredetermined size and type, in order to exactly recognize the sizechange rate according to the vertical movement of the pointing-means inthe non-contact mouse function mode. This conversion of the inputtedvideo can be performed by the video processing unit 125 or the identityunit by the control of the processor 150.

Here, in the case of two pointing-means 200 (e.g. two fingers are usedas the pointing-means), some of the video data can be displayed byincluding an area, detected with the first finger, set as the firstdetected area 1510 and another area, detected with the second finger,set as the second detected area 1520. If the size of the first detectedarea 1510 is changed in a direction of being increased and thendecreased at a rate identical to or larger than a predetermined rate,the size change can be recognized as a selecting command of theinformation item located with the mouse cursor among a plurality ofinformation items displayed on the display unit or a selection releasingcommand of the selected information item. Also, if the size change ofthe first detected area 1510 is repeated at a rate identical to orlarger than a predetermined rate, the processor 150 can recognize thesize change as the same action as the double-click of an imaginary mouseof the display unit 110 by the user. For example, if the size change ofthe first detected area 1510 is repeated in a direction of beingincreased and then decreased at a rate identical to or larger than apredetermined rate, the size change can be recognized as an executingstart command of the information item located with the mouse cursoramong a plurality of information items displayed on the display unit.Conversely, if the size change rate of the second detected area 1520 perarea size is repeated at a rate identical to or larger than apredetermined rate, the processor 150 can recognize the size change asthe same action as the click of a right button of an imaginary mouse ofthe display unit 110 by the user. For example, if the size change of thesecond detected area 1520 is repeated in a direction of being increasedand then decreased at a rate identical to or larger than a predeterminedrate, the size change can be recognized as an option information displaycommand of the information item located with the mouse cursor among aplurality of information items displayed on the display unit.

In case that the finger's end part is used as the pointing-means,although the first detected area 1510 and the second detected area 1520are photographed with a part outside of the end part of the finger, theprocessor 150 can recognize the moving locus and size change rate byconsidering the center point of the detected area as the center point ofa first knuckle of the finger.

FIG. 16 is a flow chart illustrating a menu selecting method by using anon-contact mouse function in accordance with another embodiment of thepresent invention.

The below description related to a menu selecting method can beuniversally applied to not only the case of using one finger as thepointing-means but also the case of using at least two fingers.

In a step represented by S1601, a user firstly selects a non-contactmouse function mode in the portable multimedia device 100 by pressing a‘mouse button’ 1210 of the input unit 130.

The processor 150 can control not only the start of the non-contactfunction mode but also an operation of at least one of the display unit110, the camera unit 120, the video processing unit 125 and the lightsource 140. For example, the processor 150 can direct to start to outputa video signal corresponding to an external video to the camera unit 120and direct to turn on the light source 140. The processor 150 can alsocontrol an initial screen to be converted into a screen including themenu icon display area 1230 and to be displayed through the display unit110. Here, the light source 140 emits light having a specific wavelengthand/or luminance, and the camera unit 120 generates and outputs a videosignal corresponding to a real-time external video or continuouslyphotographs (e.g. performs a preview mode) a subject at intervals of apredetermined time.

In a step represented by S1602, the user locates pointing-means, such asa finger, in front of the camera unit 120 and moves the pointing-meanshorizontally or vertically. A video signal corresponding to the movementof the pointing-means is generated and inputted into the videoprocessing unit 125. The video processing unit 125 generates and outputsvideo data for analyzing and generating change information (e.g. amoving locus and/or the size change of the formed area) of the detectedarea.

In a step represented by S1603, the identity unit recognizes a locationand size of the detected area by analyzing video data, successivelyinputted, per each frame. As described above, the detected area isrecognized by analyzing an external video formed by the light, emittedfrom the light source 140, reflected by the pointing-means and inputtedinto the camera unit 120. Also, the detected area, as described above,the detected area can be recognized by the property of the light (e.g.wavelength and/or luminance) emitted from the light source 140.

In a step represented by S1604, the identity unit recognizes a movinglocus (i.e. horizontal movement or vertical movement) by using themoving locus of the pointing means and the successive size change of theformed area, recognized through earlier steps in each inputted videoframe. As described above, the identity unit can recognize thehorizontal movement of the pointing-means by using, for example, thelocation change of the center point of the detected area and thevertical movement of the pointing-means by using the size increasing (orchange rate) of the detected area.

In a step represented by S1605, the processor 150 determines whether thepointing-means horizontally moves by using change information of thedetected area recognized by the identity unit.

If the pointing-means is horizontally moved, since the movement is tochange a menu item (or information item), displayed on the display unitas being selected, into another item or to change a location of thepointer, the processor 150 controls each element to perform a processingcorresponding to the step represented by S1606

However, if the pointing-means is vertically moved, since the movementis to execute or release a menu item (or information item), displayed onthe display unit as being selected, or corresponding to the location ofthe pointer, the processor 150 controls each element to perforin aprocessing corresponding to the step represented by S1607.

In a step represented by S1608, the processor 150 can determine whetherthe non-contact function mode is ended. For example, the ending of thenon-contact function mode will be able to be performed by apredetermined functional button or the input of the menu item. If theending of the non-contact function mode is directed, the pertinent stepsare ended. Otherwise, the step represented by S1603 is advanced again.

FIG. 17 is a flow chart illustrating a menu selecting method by using anon-contact mouse function in accordance with another embodiment of thepresent invention.

In a step represented by S1701, a user firstly selects a non-contactmouse function mode in the portable multimedia device 100 by pressing a‘mouse button’ 1210 of the input unit 130.

At this time, the processor 150 controls not only the start of thenon-contact function mode but also the operations of the display unit110, the camera unit 120, the video processing unit 125 and the lightsource 140. For example, the processor 150 directs the photographing ofthe camera unit 120 and direct to turn on the light source 140. Theprocessor 150 converts an initial screen of the display unit 110 into ascreen including the menu icon display area 1230. Accordingly, the lightsource 140 can emit light having a specific wavelength, and the cameraunit 120 can continuously photograph a subject at intervals of apredetermined time.

In a step represented by S1702, the user locates pointing-means, such asa finger, in front of the camera unit 120. At this time, the camera unit120 continuously photographs a subject at intervals of a predeterminedtime and outputs an inputted image. At this time, the movement (i.e. themoving locus) of the pointing-means by the user will be able to beidentified through each video frame successively inputted (referring toa step represented by S1704).

In a step represented by S1703, the processor 150 recognizes the sizeand location of the area photographed with the pointing-means from thesuccessively inputted video. In other words, the processor 150 firstlydetects the area photographed with the pointing-means from the inputtedvideo and recognizes the size and location of the detected area. Here,the detected area can be partitioned into the first detected area 1510and the second detected area 1520 and recognizes the size and locationper the first detected area and the second detected area 1520.

Here, the detection of the area photographed with the pointing-means canbe performed by the method for extracting a luminance component having apredetermined range. This is the reason why the area photographed withthe pointing-means, which is formed by the light, having a specificwavelength, emitted from the light source 140, reflected by thepointing-means, will have the brightness separately from other partsthrough the inputted video.

Accordingly, the video processing unit 125 can convert the inputtedvideo into YUV type video data, in order to make it easy to detect thearea photographed with the pointing-means. In other words, the processor150 can determine the area photographed with the pointing-means bydetecting a specific brightness (i.e. Y value), corresponding to thelight emitted from the light source 140, from the inputted videoconverted into YUV type video data.

Of course, at this time, a specific video filter in the video processingunit 125 can be used to detect the area photographed with thepointing-means from the inputted video. For example, if a filter,allowing a wavelength having a predetermined range corresponding to thelight emitted from the light source 140 to penetrate through it, isused, it can be possible to more exactly detect the area.

If the area photographed with the pointing-means is detected, theprocessor 150 computes the size and location of the detected area. Here,the location photographed with the pointing-means, as described above,can be set as a center point of the detected area. At this time, themouse cursor can be displayed on a location in the menu icon displayarea 1230 corresponding to the center point detected from the inputtedvideo.

However, it is not necessary that all pixels in an area determined asbeing photographed with the pointing-means must be used to compute thecenter point. For example, the center point can be estimated byselecting some (e.g. 50 pixels) pixels having a specific brightnesscomponent or according to the order of brightness from the brightestcomponent and the center point of the selected pixels. Like this,although an estimated location of the finger's end part, the use of thenon-contact mouse function in accordance with the present invention isnot seriously affected by the estimated location. This is because themouse cursor will be displayed on a location in the menu icon displayarea 1230 corresponding to the estimated location of the detectedpointing-means. In other words, as the user looks at the location of thedisplayed mouse cursor, the user can move the pointing-means to be movedon the location displayed with a menu icon intended by the mouse cursor.

In a step represented by S1704, the processor 150 computes the movinglocus of the pointing-means by using the successive change of thelocation and size of the detected area determined through earlier stepsin each inputted video frame. In other words, the processor 150 canrecognize the horizontal movement of the pointing-means by computing thelocation change of the center point of the detected area and thevertical movement of the pointing-means by computing the size increasing(or change rate) of the detected area. Since the method for computingthe moving locus of the pointing-means is described through FIG. 14 andFIG. 15, the pertinent description will be omitted.

In a step represented by S1705, the processor 150 generates a controlsignal corresponding to the moving locus according to the horizontalmovement or the vertical movement of the pointing-means. In other words,the processor 150 generates a cursor moving signal according to thehorizontal movement of the pointing-means. The generated cursor movingsignal is transferred to the menu icon display area 1230 of the displayunit 110. The cursor, displayed on the menu icon display area 1230according to the cursor moving signal, can move with drawing a locuscorresponding to the horizontal moving locus of the pointing-means.

Also, the processor 150 generates a click signal according to thevertical movement of the pointing-means.

In a step represented by S1706, the processor 150 determines whether thevertical movement is performed by the clock signal from the left buttonof a mouse or a function identical to the click signal of the rightbutton of the mouse is performed according to whether the area, detectedwith the pointing-means, is the first detected area or the seconddetected area. If the clock signal is generated by the size change ofthe second detected area, the option information of the selected menuicon can be displayed as the right button of the mouse is clicked in astep represented by S1709.

In a step represented by S1708, according to whether the area, detectedwith the pointing-means, is the first detected area and whether the sizeof the first detected area is repeated in a direction of being increasedand then decreased at a predetermined rate, the generated click signalcan be recognized as being selected with a menu function correspondingto the pertinent menu icon located with the mouse cursor in the menuicon display area 1230 like the click or double-click of the left buttonof the mouse, as being released with the selected menu icon in a steprepresented by S1711, or as being executed with the selected menu iconin a step represented by S1710.

Through the aforementioned operation, the user can take an action movingthe pointing-means horizontally or vertically in front of the cameraunit, in order to have the same effect as if the user a cursor to adesired menu icon and click the menu icon by using wire mouse.

As described above, the present invention can allow a user to moreeasily and quickly select a function by remote-controlling a menufunction by use of a camera.

The present invention can also evoke user's interest, beyond theconventional simple function selecting method through the key button.

The present invention can also maximize making the most use of elementsby allowing an equipped camera to be universally used.

The present invention can also reduce a manufacturing cost for a key padand make its size minimized and its design varied by making the best useof the internal space of a digital device.

The present invention can also determine a moving width of a pointeraccording to the distance spaced with directing means.

In addition, the present invention can not only reduce a manufacturingcost of a digital device by removing a key pad but also make its sizeminimized and its design varied by making the best use of the internalspace of the digital device, in accordance with a device and methodhaving a non-contact mouse function.

The drawings and detailed description are only examples of the presentinvention, serve only for describing the present invention and by nomeans limit or restrict the spirit and scope of the present invention.Thus, any person of ordinary skill in the art shall understand that alarge number of permutations and other equivalent embodiments arepossible. The true scope of the present invention must be defined onlyby the spirit of the appended claims.

What is claimed is:
 1. A digital processing device having aphotographing function, the device comprising: an input unit, includingat least one key button; a light source, emitting light to an outside; acamera unit, generating and outputting a video signal corresponding toan external video; a video data generating unit, generating video datacorresponding to the video signal; a display unit; and an identity unit,detecting a location of a detected area formed by light, reflected bypointing-means and inputted, of light emitted from the video data inunits of each frame, recognizing a moving locus of the detected area bycomparing at least two continuous frames and generating and outputtingcorresponding change information, wherein a pointer, a moving width ofwhich is determined by an input of a minute adjusting button, isdisplayed on the display unit of the digital processing device.
 2. Thedevice of claim 1, wherein the identity unit generates and outputscorresponding change information by recognizing a size change of thedetected area, wherein if a size of the detected area is changed in arate identical to or larger than a predetermined rate per unit time, itis predetermined that the change information is recognized as aselecting command or a releasing command of an information item, locatedwith the pointer, among a plurality of information items displayed onthe display unit.
 3. The device of claim 2, wherein the size of thedetected area is an area size of a figure formed by an outline of thedetected area or the number of a pixel included in the detected area. 4.The device of claim 1, wherein the input unit further comprises a buttonfor starting to drive the light source, the camera unit and the identityunit.
 5. The device of claim 1, wherein the light source, the cameraunit and the identity unit periodically start and stop their drivinguntil the location of the detected area is detected.
 6. The device ofclaim 1, wherein the video data is YUV data or RGB data.